CN202903636U

CN202903636U - Novel system for monitoring carbon content in flue dust on line

Info

Publication number: CN202903636U
Application number: CN 201220596615
Authority: CN
Inventors: 陈俊禄
Original assignee: Beijing Fw M & E Engineering Tech Co ltd
Current assignee: Beijing Fw M & E Engineering Tech Co ltd
Priority date: 2012-11-07
Filing date: 2012-11-07
Publication date: 2013-04-24
Anticipated expiration: 2022-11-07

Abstract

The utility model relates to a novel system for monitoring carbon content in flue dust on line. The novel system for monitoring carbon content in flue dust on line is characterized in that a sampler used for sampling is arranged in a flue, a sample sampled by the sampler is input into a measuring unit to be measured, the measuring unit comprises a crucible weighting module, a dust sampling module, and a dust sample and crucible weighting module, a dust sample burning module and a second-time dust sample and crucible weighting module; data measured by the measuring unit are input to a control and analysis unit to be analyzed, the data analyzed by the control and analysis unit are calculated by a software operation and calculation module to obtain carbon content in flue dust, and then, the carbon content in the flue dust is stored by the software operation and calculation module; and the sampler is formed by an ejection pipe, a wear-proof industrial ceramic bushing, a Laval nozzle, a cyclone separator and a flue inlet, wherein a pipe port of the ejection pipe is of the shape of a horn mouth, the Laval nozzle is connected with the ejection pipe. According to the novel system for monitoring carbon content in flue dust on line, a traditional high-precision measuring technique is combined with an unique industrial site anti-interference design technique to realize the high-precision and intelligentized continuous on-line measurement on the carbon content in the flue dust.

Description

A kind of novel unburned carbon in flue dust on-line monitoring system

Technical field

The utility model relates to a kind of novel unburned carbon in flue dust on-line monitoring system.

Background technology

The boiler flyash carbon content size is one of leading indicator of coal-fired boiler in thermal power plant burning efficiency and performance driving economy in the prior art, be mainly used in weighing station boiler and unit operation economy, when unburned carbon in flue dust is high, reflect that the boiler wind coal proportion is unreasonable, incomplete combustion not only causes cost of electricity-generating to raise, and the discharging that has increased solid particle, but the value of flyash is reduced, environment has been caused seriously influence.Be by measuring the spectral emittance of different-waveband flying dust with regard to present employed infrared technique, and draw the carbon content of flying dust, it is relatively low that this technology is subjected to coal type change to affect very large measuring accuracy; Microwave technology is to utilize carbon that the characteristic of microwave energy absorption is obtained carbon containing value in the flying dust, this technology is subjected to the larger system calibrating workload of the impact of coal type change large equally, the easy dewfall of sampling line causes sampling line to stop up, and the whole system maintenance workload is large.

Summary of the invention

Technical problem to be solved in the utility model is to overcome the deficiencies in the prior art, a kind of novel unburned carbon in flue dust on-line monitoring system is provided, the technical scheme that its technical matters that solves the utility model adopts is: structure of the present utility model comprises flue, sampler, induction tunnel, wear-resisting industrial ceramics sleeve pipe, Laval-cavity nozzle, cyclone separator, gas approach, measuring unit, claim the crucible weight module, get the ash sample module, ash sample adds the crucible Weighing module, ash sample calcination module, ash sample adds again Weighing module of crucible, the control analysis unit, the software operation computing module, it is characterized in that sampler is arranged in the flue, take a sample by sampler, sampler taking-up sample enters measuring unit and measures, measuring unit comprises title crucible weight module, get the ash sample module, ash sample adds the crucible Weighing module, ash sample calcination module and ash sample add again Weighing module of crucible, the data of measuring through measuring unit enter the control analysis element analysis, the data that gone out by the control analysis element analysis are transferred to the software operation computing module and are calculated unburned carbon in flue dust and preserve, sampler is by induction tunnel, wear-resisting industrial ceramics sleeve pipe, Laval-cavity nozzle, cyclone separator and gas approach form, the mouth of pipe of induction tunnel is bell mouth shape, and Laval-cavity nozzle is connected with induction tunnel.

Principle of work: flying dust enters separation vessel by the fly ash constant speed sampling gun, the crucible of shelving in advance by entering (middle solenoid valve is opened) behind the separation vessel.Flue gas returns flue by Laval-cavity nozzle, and system weighs to crucible before ashes falls, and signal imports the usefulness that data handling system gives over to computational analysis into.(this setting value is for preseting, and the native system setting value is 10g) closed electromagnetic valve when the ash amount in the crucible arrives setting value, systematic sampling is finished.Crucible enters " firing chamber " getting ash sample is advanced the processing of shape high temperature sintering, and the time is 5 minutes.And then the crucible of weighing, system is to before receiving ash, the weight that the receipts ash reaches after the calcination is afterwards measured respectively, the weight numerical value of surveying is calculated, obtain the carbon containing value of flying dust and show at the display screen of control module, weighing data calculates unburned carbon in flue dust by data handling system simultaneously, and this signal is transported in the DCS system, and the ash exhauster of the ash sample of calcination by system is discharged into and goes in the flue, finish the measuring process of a unburned carbon in flue dust, system all purged the Fly ash sampling pipeline portions before each the measurement, to guarantee the representativeness of Fly ash sampling.Fly ash sampler is to utilize static balance principle constant speed suction ash-laden gas, flue gas enters cyclone separator through sampling head, the stopple coupon of Wear-resistant Treatment, under centrifugal action, the fly ash granule in the flue gas is collected by collecting the gray bottle, and the flue gas after the separation reenters flue by the fume emission hole.Measuring unit is comprised of parts such as regaining assembly, ash discharge assembly, calcination assembly, topworks, the assembly of weighing.The course of work of measuring unit and function realize automatically control by system controlling software.

The beneficial effects of the utility model are that the utility model utilizes traditional Technology Precision in conjunction with the industry spot Anti-interference Design technology of uniqueness, realizes unburned carbon in flue dust is carried out high precision, intelligent continuously online measurement.This apparatus structure is reasonable in design to have guaranteed that from measuring principle the raising of measuring accuracy is not subjected to the impact of coal type change, and system calibrating simple and fast maintenance is little.

Description of drawings

Fig. 1: the utility model example structure synoptic diagram.

Fig. 2: the utility model embodiment sampler structure synoptic diagram.

Among the figure: flue 1, sampler 2, induction tunnel 2.1, wear-resisting industrial ceramics sleeve pipe 2.2, Laval-cavity nozzle 2.3, cyclone separator 2.4, gas approach 2.5, measuring unit 3, claim crucible weight module 4, get ash sample module 5, ash sample adds crucible Weighing module 6, ash sample calcination module 7, ash sample add crucible again Weighing module 8, control analysis unit 9, software operation computing module 10.

Embodiment

With reference to description of drawings the utility model is done following concrete detailed description.As shown in drawings, structure of the present utility model comprises flue 1, sampler 2, induction tunnel 2.1, wear-resisting industrial ceramics sleeve pipe 2.2, Laval-cavity nozzle 2.3, cyclone separator 2.4, gas approach 2.5, measuring unit 3, claim crucible weight module 4, get ash sample module 5, ash sample adds crucible Weighing module 6, ash sample calcination module 7, ash sample adds again Weighing module 8 of crucible, control analysis unit 9, software operation computing module 10, it is characterized in that sampler 2 is arranged in the flue 1, take a sample by sampler 2, sampler 2 taking-up samples enter measuring unit 3 and measure, measuring unit 3 comprises title crucible weight module 4, get ash sample module 5, ash sample adds crucible Weighing module 6, ash sample calcination module 7 and ash sample add again Weighing module 8 of crucible, the data of measuring through measuring unit 3 enter 9 analyses of control analysis unit, the data that analyzed by control analysis unit 9 are transferred to software operation computing module 10 and are calculated unburned carbon in flue dust and preserve, sampler 2 is by induction tunnel 2.1, wear-resisting industrial ceramics sleeve pipe 2.2, Laval-cavity nozzle 2.3, cyclone separator 2.4 and gas approach 2.5 form, the mouth of pipe of induction tunnel 2.1 is bell mouth shape, and Laval-cavity nozzle 2.3 is connected with induction tunnel 2.1.

Embodiment recited above is described preferred implementation of the present utility model; be not that design of the present utility model and scope are limited; under the prerequisite that does not break away from the utility model design concept; common engineering technical personnel make the technical solution of the utility model in this area various modification and improvement; all should fall into protection domain of the present utility model; the technology contents that the utility model is asked for protection all is documented in claims.

Claims

1. novel unburned carbon in flue dust on-line monitoring system, comprise flue (1), sampler (2), induction tunnel (2.1), wear-resisting industrial ceramics sleeve pipe (2.2), Laval-cavity nozzle (2.3), cyclone separator (2.4), gas approach (2.5), measuring unit (3), claim crucible weight module (4), get ash sample module (5), ash sample adds crucible Weighing module (6), ash sample calcination module (7), ash sample adds again Weighing module (8) of crucible, control analysis unit (9), software operation computing module (10), it is characterized in that sampler (2) is arranged in the flue (1), take a sample by sampler (2), sampler (2) taking-up sample enters measuring unit (3) and measures, measuring unit (3) comprises title crucible weight module (4), get ash sample module (5), ash sample adds crucible Weighing module (6), ash sample calcination module (7) and ash sample add again Weighing module (8) of crucible, the data of measuring through measuring unit (3) enter control analysis unit (9) analysis, the data that analyzed by control analysis unit (9) are transferred to software operation computing module (10) and are calculated unburned carbon in flue dust and preserve, sampler (2) is by induction tunnel (2.1), wear-resisting industrial ceramics sleeve pipe (2.2), Laval-cavity nozzle (2.3), cyclone separator (2.4) and gas approach (2.5) form, the mouth of pipe of induction tunnel (2.1) is bell mouth shape, and Laval-cavity nozzle (2.3) is connected with induction tunnel (2.1).