CN203894138U - Double-charge full-automatic on-line pulverized coal detection device - Google Patents

Double-charge full-automatic on-line pulverized coal detection device Download PDF

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Publication number
CN203894138U
CN203894138U CN201420254440.5U CN201420254440U CN203894138U CN 203894138 U CN203894138 U CN 203894138U CN 201420254440 U CN201420254440 U CN 201420254440U CN 203894138 U CN203894138 U CN 203894138U
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China
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fineness
pulverized coal
resistance
sensor
wind powder
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CN201420254440.5U
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Chinese (zh)
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郑建农
陈念军
孙波
周莉
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WUXI HUATONG ENVIRONMENTAL PROTECTION EQUIPMENT CO Ltd
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WUXI HUATONG ENVIRONMENTAL PROTECTION EQUIPMENT CO Ltd
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Abstract

The utility model relates to an on-line detection device, and in particular relates to a double-charge full-automatic on-line pulverized coal detection device which is specifically used for carrying out on-line detection on the fineness of pulverized coal in a primary pulverized coal pipeline of a thermal power plant, belonging to the technical field of pulverized coal fineness detection. According to the technical scheme provided by the utility model, the double-charge full-automatic on-line pulverized coal detection device comprises an air and pulverized coal pipe which is provided with a fineness sensor used for detecting the fineness of the pulverized coal in the air and pulverized coal pipe; the fineness sensor is connected with a signal processing circuit by a coaxial cable; the signal processing circuit is connected with an upper computer. The double-charge full-automatic on-line pulverized coal detection device is compact in structure, and is capable of realizing the on-line measurement of the fineness of the pulverized coal, thus providing a reliable basis for optimized burning and safe operation of a boiler.

Description

Double charge full automatic pulverized coal on-line measuring device
Technical field
The utility model relates to a kind of on-line measuring device, and especially a kind of double charge full automatic pulverized coal on-line measuring device, specifically for the online detection of the coal dust pipeline fineness of pulverized coal in fuel-burning power plant, belongs to the technical field that fineness of pulverized coal detects.
Background technology
Fineness of pulverized coal has vital impact to boiler efficiency and noxious gas emission level, therefore must regularly mobile fineness of pulverized coal in each pulverized coal feed pipe of connection burner be sampled, be detected, and correspondingly adjust according to detecting measurement result.
At present, the detection of power plant's fineness of pulverized coal is all after coal dust being taken out one by one from coal pipe by coal fines sampling apparatus manually or automatically, then delivers to laboratory and analyze, and not only process is complicated loaded down with trivial details and waste time and energy, and testing result time lag, be unfavorable for burning adjustment.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and a kind of double charge full automatic pulverized coal on-line measuring device is provided, and its compact conformation, can realize the on-line measurement of fineness of pulverized coal, for boiler optimization burning and safe operation provide reliable foundation.
The technical scheme providing according to the utility model, described double charge full automatic pulverized coal on-line measuring device, comprises wind powder pipe; The fineness sensing device that is provided for detecting fineness of pulverized coal in described wind powder pipe on described wind powder pipe, described fineness sensing device is connected with signal processing circuit by concentric cable, and described signal processing circuit is connected with host computer.
Described fineness sensing device comprises the first fineness sensor and the second fineness sensor, described the first fineness sensor and the second fineness installation of sensors are in the horizontal segment of wind powder pipe, and the first fineness sensor, the second fineness sensor are distribution up and down on wind powder pipe, and the first fineness sensor and the second fineness sensor are 100mm at the fore-and-aft distance of wind powder pipe.
Described the first fineness sensor and the second fineness sensor include test rod and are positioned at the sealing cap of described test rod end, and described test rod comprises conductor, is wrapped in the inductive layer on described conductor outer wall and is arranged on the wear-resistant ceramic on described inductive layer outer wall.
Connection exit is set on described sealing cap, and described connection exit is electrically connected with conductor.
Described signal processing circuit comprises operational amplifier U1, the end of oppisite phase of described operational amplifier U1 is connected with one end of resistance R 2, the other end of resistance R 2 is connected with one end of capacitor C 1 and one end of resistance R 1, the equal ground connection of the other end of the other end of capacitor C 1 and resistance R 1, the in-phase end of operational amplifier U1 is connected with one end of resistance R 3 and one end of resistance R 4, the other end ground connection of resistance R 3, the other end of resistance R 4 is connected with the output terminal of operational amplifier U1 and one end of resistance R 5.
Advantage of the present utility model: fineness sensing device is set on wind powder pipe, fineness sensing device connects signal processing circuit by concentric cable, the current signal obtaining transfers in host computer after signal processing circuit is processed, after host computer analyzing and processing, obtain fineness and the harmony of coal dust, compact conformation, can realize the on-line measurement of fineness of pulverized coal, for boiler optimization burning and safe operation provide reliable foundation.
Brief description of the drawings
Fig. 1 is schematic diagram of the present utility model.
Fig. 2 is the circuit theory diagrams of the utility model signal processing circuit.
Fig. 3 is the structural representation of the utility model fineness sensor.
Description of reference numerals: 1-wind powder pipe, 2-the first fineness sensor, 3-the second fineness sensor, 4-concentric cable, 5-signal processing circuit, 6-host computer, 7-test rod, 8-sealing cap, 9-connect exit, 10-wear-resistant ceramic, 11-inductive layer and 12-conductor.
Embodiment
Below in conjunction with concrete drawings and Examples, the utility model is described in further detail.
As shown in Figure 1: in order to realize the on-line measurement of fineness of pulverized coal, for boiler optimization burning and safe operation provide reliable foundation, the utility model comprises wind powder pipe 1; The fineness sensing device that is provided for detecting described wind powder pipe 1 interior fineness of pulverized coal on described wind powder pipe 1, described fineness sensing device is connected with signal processing circuit 5 by concentric cable 4, and described signal processing circuit 5 is connected with host computer 6.
Particularly, by the fineness of fineness sensing device Real-time Obtaining wind powder pipe 1 interior coal dust, transfer to signal processing circuit 5 by concentric cable 4, be converted to by signal processing circuit 5 signal that host computer 6 can be identified, by determining fineness and the harmony of the interior each detection segment coal dust of wind powder pipe 1 after host computer 6 analyzing and processing, host computer 6 can show output by above-mentioned analysis processing result, and can be connected on Power Plant DCS System or other supervisory control comuter, use for digital burning optimization, improve the efficiency of burning.
Further, described fineness sensing device comprises the first fineness sensor 2 and the second fineness sensor 3, described the first fineness sensor 2 and the second fineness sensor 3 are installed on the horizontal segment of wind powder pipe 1, and the first fineness sensor 2, the second fineness sensor 3 are distribution up and down on wind powder pipe 1, and the first fineness sensor 2 and the second fineness sensor 3 are 100mm at the fore-and-aft distance of wind powder pipe 1.
In order to realize the fineness of pulverized coal to wind powder pipe 1 diverse location region, can on the varying level position of wind powder pipe 1, fineness sensing device be all installed, install the first fineness sensor 2 and second sensor 3 of lower distribution, after the first fineness sensor 2 and the second fineness sensor 3 are arranged on wind powder pipe 1, the first fineness sensor 2 and the second fineness sensor 3 are all perpendicular to the axis of wind powder pipe 1, the first fineness sensor 2 and the fore-and-aft distance of the second fineness sensor 3 in wind powder pipe 1 are 100mm, guarantee that the first fineness sensor 2 and the second fineness sensing 3 detect the precision of output.
As shown in Figure 3, described the first fineness sensor 2 and the second fineness sensor 3 include test rod 7 and are positioned at the sealing cap 8 of described test rod 7 ends, and described test rod 7 comprises conductor 12, is wrapped in the inductive layer 11 on described conductor 12 outer walls and is arranged on the wear-resistant ceramic 10 on described inductive layer 11 outer walls.On described sealing cap 8, arrange and connect exit 10, described connection exit 10 is electrically connected with conductor 12.
In the utility model embodiment, the structure of the first fineness sensor 2 adopts identical structure with the structure of the second fineness sensor 3, the other end that test rod 7 arranges sealing cap 8 is positioned at wind powder pipe 1, by inductive layer 11 and conductor 12, the electric charge of induction is drawn to connection exit 10 by connection exit 10 and is connected with signal processing circuit 5 by concentric cable 4.
As shown in Figure 2, described signal processing circuit 5 comprises operational amplifier U1, the end of oppisite phase of described operational amplifier U1 is connected with one end of resistance R 2, the other end of resistance R 2 is connected with one end of capacitor C 1 and one end of resistance R 1, the equal ground connection of the other end of the other end of capacitor C 1 and resistance R 1, the in-phase end of operational amplifier U1 is connected with one end of resistance R 3 and one end of resistance R 4, the other end ground connection of resistance R 3, and the other end of resistance R 4 is connected with the output terminal of operational amplifier U1 and one end of resistance R 5.
One end that capacitor C 1 is connected with resistance R 1 and resistance R 2 is connected with concentric cable 4, so that the signal of the first fineness sensor 2 and the second fineness sensor 3 is processed to output.The other end of resistance R 5 is connected with host computer 6 by signal cable.
As shown in Fig. 1 ~ Fig. 3, coal cinder is polished, is rolled in the process of pulverized coal particle in coal pulverizer, and coal dust is in process of pneumatic transmission, and powder granule always will bump with tube wall, rub and separate, between powder granule and particle, also to bump, rub and separate.A large amount of like this close contacts and the process separating, can make on powder band a considerable amount of static charges.And charged pulverized coal particle can produce certain electrostatic field; in the time that charged coal dust particle passes through the end of test rod 7; test rod 7 surfaces in electrostatic field produce equivalent induced charge, when a large amount of charged pulverized coal flows are crossed the end of test rod 7, on test rod 7, form induction current.Faradic size is relevant with the pulverized coal particle quality of the test rod 7 of flowing through, and using induction current as measuring-signal, to being arranged on number processing and analyze of horizontal pipe upper and lower part, just can obtain the fineness of coal dust.
The first fineness sensor 2 and the second fineness sensor 3 are installed respectively on the flat pipeline of wind powder pipe 1, adopt passive passsive sensor structure, by concentric cable 4, the electrostatic signal sensing is sent to signal processing circuit 5, signal processing circuit 5 is transformed into the current signal of standard after signal is processed, by signal cable, signal is sent into host computer 6 again, host computer 6 is to the data analysis receiving and processing, determine the flow and harmony etc. of each wind powder pipe 1 pulverized coal flow of surveying, and these data are shown, also can be connected to Power Plant DCS System by network, thereby realize the real-time fineness on-line analysis of coal dust.
The utility model arranges fineness sensing device on wind powder pipe 1, fineness sensing device connects signal processing circuit 5 by concentric cable 4, the current signal obtaining transfers in host computer 6 after signal processing circuit 5 is processed, after host computer 6 analyzing and processing, obtain fineness and the harmony of coal dust, compact conformation, can realize the on-line measurement of fineness of pulverized coal, for boiler optimization burning and safe operation provide reliable foundation.

Claims (5)

1. a double charge full automatic pulverized coal on-line measuring device, comprises wind powder pipe (1); It is characterized in that: the fineness sensing device that is provided for detecting the interior fineness of pulverized coal of described wind powder pipe (1) on described wind powder pipe (1), described fineness sensing device is connected with signal processing circuit (5) by concentric cable (4), and described signal processing circuit (5) is connected with host computer (6).
2. double charge full automatic pulverized coal on-line measuring device according to claim 1, it is characterized in that: described fineness sensing device comprises the first fineness sensor (2) and the second fineness sensor (3), described the first fineness sensor (2) and the second fineness sensor (3) are installed on the horizontal segment of wind powder pipe (1), and the first fineness sensor (2), the second fineness sensor (3) are distribution up and down on wind powder pipe (1), and the first fineness sensor (2) and the second fineness sensor (3) are 100mm at the fore-and-aft distance of wind powder pipe (1).
3. double charge full automatic pulverized coal on-line measuring device according to claim 2, it is characterized in that: described the first fineness sensor (2) and the second fineness sensor (3) include test rod (7) and be positioned at the sealing cap (8) of described test rod (7) end, described test rod (7) comprises conductor (12), is wrapped in the inductive layer (11) on described conductor (12) outer wall and is arranged on the wear-resistant ceramic (10) on described inductive layer (11) outer wall.
4. double charge full automatic pulverized coal on-line measuring device according to claim 3, is characterized in that: on described sealing cap (8), arrange and connect exit (10), described connection exit (10) is electrically connected with conductor (12).
5. double charge full automatic pulverized coal on-line measuring device according to claim 1, it is characterized in that: described signal processing circuit (5) comprises operational amplifier U1, the end of oppisite phase of described operational amplifier U1 is connected with one end of resistance R 2, the other end of resistance R 2 is connected with one end of capacitor C 1 and one end of resistance R 1, the equal ground connection of the other end of the other end of capacitor C 1 and resistance R 1, the in-phase end of operational amplifier U1 is connected with one end of resistance R 3 and one end of resistance R 4, the other end ground connection of resistance R 3, the other end of resistance R 4 is connected with the output terminal of operational amplifier U1 and one end of resistance R 5.
CN201420254440.5U 2014-05-16 2014-05-16 Double-charge full-automatic on-line pulverized coal detection device Active CN203894138U (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104655864A (en) * 2015-02-12 2015-05-27 唐山瑞思可节能技术有限公司 Online pulverized coal real-time detection device
CN106443055A (en) * 2016-08-31 2017-02-22 西安艾贝尔科技发展有限公司 Coil-type wind powder online measuring system and method
CN113042189A (en) * 2021-03-16 2021-06-29 广州敏远能源科技有限公司 Multi-parameter monitoring system and method for pulverized coal particles of boiler coal mill

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104655864A (en) * 2015-02-12 2015-05-27 唐山瑞思可节能技术有限公司 Online pulverized coal real-time detection device
CN106443055A (en) * 2016-08-31 2017-02-22 西安艾贝尔科技发展有限公司 Coil-type wind powder online measuring system and method
CN113042189A (en) * 2021-03-16 2021-06-29 广州敏远能源科技有限公司 Multi-parameter monitoring system and method for pulverized coal particles of boiler coal mill

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