CN201032160Y - Boiler wind powder online monitoring device - Google Patents
Boiler wind powder online monitoring device Download PDFInfo
- Publication number
- CN201032160Y CN201032160Y CNU2007201394326U CN200720139432U CN201032160Y CN 201032160 Y CN201032160 Y CN 201032160Y CN U2007201394326 U CNU2007201394326 U CN U2007201394326U CN 200720139432 U CN200720139432 U CN 200720139432U CN 201032160 Y CN201032160 Y CN 201032160Y
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- pulverized
- sensor
- wind speed
- monitoring
- wind powder
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Abstract
The utility model relates to an online monitoring device used for the wind powder of a boiler, specifically a monitoring device which is suitable for the direct online monitoring and the display of the concentration of the wind powder of the boiler of a power plant. The device belongs to the technical field of environmental-protecting equipment. The utility model consists of a wind powder concentration monitoring circuit branch, a wind speed monitoring circuit branch and a temperature monitoring circuit branch which are connected in parallel. After the detection of the monitoring device, the utility model transmits mV signals, a transmitter enlarges the output and a converter deals with the output, so as to realize the multi-channel DC output signals; a user terminal apparatus can display the wind powder concentration; the input index can be regulated and controlled according to requirements. The utility model is simple in structure, convenient in use and low in cost.
Description
Technical field
The utility model relates to a kind of boiler wind powder on-Line Monitor Device, and it is a kind of monitoring device that is applicable to the direct-on-line monitoring and shows the boiler of power plant pulverized-coal concentration specifically, and it belongs to the enviromental protection instrument equipment technical field.
Background technology
Guarantee the normal combustion of boiler of power plant coal dust, must make fuel and the air carried to boiler furnace maintain certain coal-air ratio, so just can guarantee the best combustion of boiler of power plant.
If coal dust is too much, it is insufficient then to burn, and a lot of coal dusts enter atmosphere without after-flame in burner hearth, both wasted fuel, and the severe contamination atmosphere also stops up dangerous accidents such as airduct and combustor exit coking easily again.If air is too much, it is many then to take away heat, and fire box temperature is descended, and causes imperfect combustion.
Boiler will often be regulated coal dust and air feed in running in the past, so that guarantee the coal-air ratio of boiler combustion.The stoker personnel borrow the aperture of regulating machine supplying powder rotating speed or control valve by rule of thumb according to a blast size, the control powder-feeding amount.This technical scheme error is big, and hysteresis is arranged, and can't carry out detecting in real time continuously, and man's activity is bigger, thereby is difficult in time provide burning control parameter.Therefore be a long felt need for a kind of on-Line Monitor Device of wind powdery condition can intuitively reflect boiler combustion the time.
Summary of the invention
The purpose of this utility model just is to overcome and avoid the shortcoming and defect of prior art, and provide a kind of novel boiler wind powder on-Line Monitor Device, the problem that the utility model exists at prior art, utilize the electrostatic charge measuring principle, development and design card edge type pulverized-coal concentration on-Line Monitor Device, this product special structure design and connected mode can be implemented in the line continuous monitoring, at any time grasp pulverized-coal concentration, for the coal dust amount and the air capacity of pulverized-coal fired boiler are effectively mated, pulverized-coal concentration control parameter is provided, satisfies the production demand.The utility model is simple in structure, easy to use, with low cost.
The utility model is to adopt following technical measures to realize its goal of the invention.
The utility model is to be connected in parallel and to be constituted by pulverized-coal concentration monitoring branch road, air monitoring branch road, three monitoring branch roads of temperature monitoring branch road, and wherein a pulverized-coal concentration monitoring route pulverized-coal concentration sensor and pulverized-coal concentration transmitter are composed in series; Air monitoring props up route measuring wind speed probe and the wind speed transmitter is composed in series; Temperature monitoring props up the route temperature sensor and temperature transmitter is composed in series, more than the sensor and the measuring probe of three monitoring branch roads all be placed in the tested wind powder pipe, three transmitters of three monitoring branch roads are connected with a converter jointly.
Described pulverized-coal concentration sensor is made of measurement electrode, insulating sleeve and sensor main body suit successively, and measurement electrode is longer than insulating sleeve, and insulating sleeve is longer than sensor main body, and the two ends of sensor main body have and are used for fixing the connection external screw thread.
Described measuring wind speed probe is by firm banking, wind speed probe, constitutes from the assembling of deashing rod, and the wind speed probe is the backing tube of fixed in position on fixed head, and fixed head is installed in an end of firm banking, is suspended in the backing tube from the deashing rod.
Described is to be composed in series by backing tube nut, steel wire, shackle and vibration bloom from the deashing rod.Described temperature sensor can be selected the platinum resistance thermometer sensor, sensor for use.Described fixed head and backing tube junction are welded seal, and airtight pressure testing is 2.5MPa, the assembling that closely cooperates of insulating sleeve and measurement electrode and insulating sleeve and sensor main body, and airtight pressure testing is 2.5MPa.
The utility model detects through monitoring device, output mV signal, and transmitter amplifies output, and converter is handled, and realizes multichannel DC output signal, shows pulverized-coal concentration by user access, and implements the adjustment control of input pointer as requested.The utility model is simple in structure, easy to use, with low cost.
Description of drawings
Fig. 1 is a structure principle chart of the present utility model.
Fig. 2 is a Monitoring and Controlling schematic flow sheet of the present utility model.
Fig. 3 is a pulverized-coal concentration monitoring principle schematic diagram.
Fig. 4 is the air monitoring principle schematic.
Fig. 5 is the front view of pulverized-coal concentration sensor.
Fig. 6 is the right view of pulverized-coal concentration sensor.
Fig. 7 is the front view of measuring wind speed probe.
Fig. 8 is the cutaway view along A-A direction among Fig. 7.
Fig. 9 is from deashing rod front view.
Figure 10 is from deashing bar structure cutaway view.
Figure 11 is the cutaway view along B-B direction among Figure 10.
Figure 12 is the firm banking cutaway view along C-C direction among Figure 14.
Figure 13 is the right view of firm banking.
Figure 14 is the vertical view of firm banking.
Figure 15 is the front view of wind speed probe.
Figure 16 is the right view of wind speed probe.
Figure 17 is the cutaway view along D-D direction among Figure 15.
As shown in the figure, wherein D is a pulverized-coal concentration; AE is the pulverized-coal concentration sensor; AT is the pulverized-coal concentration transmitter; AY is a converter; YS is a user terminal displays; S is a primary air velocity; SE is the measuring wind speed probe; ST is the wind speed differential pressure transmitter; RS232 is the computer communication interface; T is a wind powder temperature; TE is a wind powder temperature sensor; TT is a temperature transmitter; L is a coal dust;
Be electronic machine supplying powder; V is a butterfly valve; P is the wind speed dynamic pressure; Δ P is a differential pressure; 1 is measurement electrode; 2 is insulating sleeve; 3 is sensor main body left end external screw thread; 4 is sensor main body; 5 is sensor main body right-hand member external screw thread; 6 is internal thread hole; 7 are the wind speed probe; 8 is firm banking; 9 is from the deashing rod; 10 is the backing tube nut; 11 is steel wire; 12 is shackle; 13 are the vibration bloom; 14 for measuring pressure-inducing nozzle; 15 is fixed head; 16 is backing tube.
The specific embodiment
The utility model will be further described below in conjunction with the accompanying drawing illustrated embodiment.
Present embodiment is to be connected in parallel and to be constituted by pulverized-coal concentration monitoring branch road, air monitoring branch road, three monitoring branch roads of temperature monitoring branch road, and wherein a pulverized-coal concentration monitoring route pulverized-coal concentration sensors A E and pulverized-coal concentration transmitter AT are composed in series; Air monitoring props up route measuring wind speed probe SE and wind speed transmitter ST is composed in series; Temperature monitoring props up route temperature sensor TE and temperature transmitter TT is composed in series, more than sensors A E, TE and the measuring probe SE of three monitoring branch roads all be placed in the tested wind powder pipe, three transmitter AT, ST of three monitoring branch roads, TT are connected with a converter AY jointly.
Pulverized-coal concentration sensors A T is made of measurement electrode 1, insulating sleeve 2 and sensor main body 4 suit successively, and measurement electrode 1 is longer than insulating sleeve 2, and insulating sleeve 2 is longer than sensor main body 4, and the two ends of sensor main body 4 have and are used for fixing connection external screw thread 3,5.
Measuring wind speed probe SE is by firm banking 8, wind speed probe 7, constitutes from 9 assemblings of deashing rod, and wind speed probe 7 is the backing tube 16 of fixed in position on fixed head 15, and fixed head 15 is installed in an end of firm banking 8, in deashing rod 9 is suspended on backing tube 16.
From deashing rod 9 is to be composed in series by backing tube nut 10, steel wire 11, shackle 12 and vibration bloom 13.Temperature sensor TE can select the platinum resistance thermometer sensor, sensor for use.Fixed head 15 is a welded seal with backing tube 16 junctions, and airtight pressure testing is 2.5MPa, the assembling that closely cooperates of insulating sleeve 2 and measurement electrode 1 and insulating sleeve 2 and sensor main body 4, and airtight pressure testing is 2.5MPa.
The structure of present embodiment is made up of pulverized-coal concentration D, wind speed S, three monitoring circuits of temperature T, and pulverized-coal concentration is measured the loop and is made up of wind powder sensors A E, transmitter AT; The measuring wind speed loop is made up of pop one's head in SE, transmitter ST of measuring wind speed; The temperature survey loop is made up of temperature sensor TE, transmitter TT.More than three measure the shared converter AY in loop, the converter output signal shows pulverized-coal concentration by user terminal displays end YS.
Observing and controlling principle of the present utility model is such, and pulverized-coal fired boiler will guarantee best combustion, and necessary coal dust L and air quantity S are reasonably combined, produce certain pulverized-coal concentration, as boiler combustion control parameter.When pulverized-coal concentration was excessive, feeder M rotating speed was moved in adjustable economize on electricity, reduced the coal dust amount, and pulverized-coal concentration is descended; Or increase air-supply butterfly valve V aperture, and increase air output, pulverized-coal concentration is descended; When pulverized-coal concentration is too small, use same quadrat method, can increase the coal dust amount, coal powder density is improved; Or the minimizing air output, coal powder density is improved.Wind powder temperature parameter plays the effect of wind speed compensation.When temperature was high, wind speed raise; When temperature is low, wind speed decreased.
The pulverized-coal concentration measurement is based on the wind powder in transmission course, coal dust particle collides, rubs, separates the formation electrostatic field mutually, the electrostatic field size is directly proportional with pulverized-coal concentration, detect through pulverized-coal concentration sensors A E, output mV signal, transmitter AT amplifies, output 0-10V voltage signal, converter AE handles, and realizes multichannel DC4-20mA output signal or through the RS232 communication interface, shows pulverized-coal concentration by user access.
The structure of pulverized-coal concentration sensors A E is as follows: sensor is made up of measurement electrode 1, insulating sleeve 2 and sensor main body 4.Main body 4 left end external screw threads 3 are to be used for sensors A E is fixed on the measurement line; Main body 4 right-hand member external screw threads 5 connect terminal box.Electrode 1 left end is a measuring junction, is inserted to the measuring tube center, directly contacts tested wind powder.Electrode 1 right-hand member inner bolt hole 6 is that measuring-signal is drawn the line ball screw hole that spins, and sends this signal to transmitter AT and converter AY successively.The assembling of sensors A E be with insulating sleeve 2 inboard with the assembling that closely cooperates of measurement electrode 1 and the outside and sensor main body 4, airtight pressure testing is 2.5MPa, pressurize 5 minutes, the place's of closely cooperating nothing leakage.
Pulverized-coal concentration transmitter AT is input to the mV signal of pulverized-coal concentration transmitter AT by sensors A E according to pulverized-coal concentration size, amplifies through the computing of transmitter AT secondary, and the third level isolates the voltage signal of output 0-10V, is input to converter AY.
Measuring wind speed is based on the backing tube measuring principle, and wind speed probe 7 is installed in the wind powder pipe, is inserted to tube hub, measures wind speed differential pressure Δ p, amplifies output DC4-20mA signal through the differential pressure transmitter conversion.Wind speed transmitter ST is an approved product, i.e. 1151 types or 3051 types of Rosemount INC.'s production are selected by the user.
The wind speed computing formula
Wind speed in V-pipe wherein, K-wind speed probe calibration coefficient, the differential pressure that Δ p-wind speed probe records, ρ-atmospheric density,
ρ wherein
0Be the atmospheric density under the status of criterion, T is the air themperature under the duty
The characteristics of wind speed probe 7 of the present utility model are reasonable in design, and are simple in structure, measure accurately; Can directly insert the production technology pipeline, easy for installation; Backing tube 16 outer lining dedicated ceramic pipes, wearability is strong; Hang from deashing rod 9 in the backing tube 16, clean dust in the backing tube 16 automatically, prevent to stop up.
Measuring wind speed probe SE should vertically install and use, and in deashing rod 9 was suspended on backing tube 16 in the wind speed probe 7, firm banking 8 was welded on the tested process duct.Firm banking 8 other ends are connected with wind speed probe 7 usefulness screws, and sealing place is the rubber asbestos pad.Fixed head 15 is a welded seal with backing tube 16 junctions, airtight pressure testing 2.5MPa, and pressurize 5 minutes does not have and leaks.
The temperature survey of wind powder is to utilize WZP type Pt100 platinum resistance thermometer sensor, sensor TE to measure, and transmitter TT amplifies, and output 4-20mA standard signal is standard component, model: WZP type Pt100 thermal resistance.
Converter AY operation principle is the 0-10V voltage signal by pulverized-coal concentration transmitter AT output, exports multichannel DC4-20mA current signal or through the RS232 communication interface, signal is shown pulverized-coal concentration by user access after converter AY amplifies processing.The 4-20mA current signal unconverted of wind speed transmitter ST and wind powder temperature transmitter TT output is directly given user's display unit
Effect of the present utility model and advantage are safety anti-explosives, the explosion-proof ExiaII BT2 that is masked as; The electrostatic charge measuring principle, the precision height, it is little to lag behind; Easy for installation, anti-wear-resisting, non-maintaining sensor guarantees use in 3 years; The measuring wind speed probe has from the deashing function, can prevent that measuring tube stops up; Can monitor a plurality of pulverized-coal concentrations in the combustion system simultaneously, rod figure shows curve record in real time; Automatically the compensation wind-warm syndrome influences wind speed; Carry out the monitoring of coal dust amount, improve the security and the economy of boiler operatiopn.
The pulverized-coal concentration measurement category of present embodiment is 0-50kg/m
3, certainty of measurement is ± 5%; The differential pressure range of wind powder speed is 1500Pa, and measuring speed is 0-50m/s, and certainty of measurement is ± 1.0% ± 1.5%; The measurement category of wind powder temperature is 0-250 ℃, and certainty of measurement is ± 1.0%-± 1.5%; Degree of protection is IP 65; The way of output is DC4-20mA or RS232 communication interface; Type of alarm is that HL reports to the police; Supply voltage is AC220V, 3A.
The utility model special structure design and connected mode can be implemented in line continuous monitoring and control, grasp the pipeline pulverized-coal concentration at any time, and burning control parameter in time is provided, and have satisfied the production demand.The utility model is simple in structure, easy to use, with low cost.
Claims (6)
1. boiler wind powder on-Line Monitor Device, it is to be connected in parallel and to be constituted by pulverized-coal concentration monitoring branch road, air monitoring branch road, three monitoring branch roads of temperature monitoring branch road, it is characterized in that a described pulverized-coal concentration monitoring route pulverized-coal concentration sensor and pulverized-coal concentration transmitter are composed in series; Air monitoring props up route measuring wind speed probe and the wind speed transmitter is composed in series; Temperature monitoring props up the route temperature sensor and temperature transmitter is composed in series, more than the sensor and the measuring probe of three monitoring branch roads all be placed in the tested wind powder pipe, three transmitters of three monitoring branch roads are connected with a converter jointly.
2. boiler wind powder on-Line Monitor Device according to claim 1, it is characterized in that described pulverized-coal concentration sensor is made of measurement electrode, insulating sleeve and sensor main body suit successively, measurement electrode is longer than insulating sleeve, insulating sleeve is longer than sensor main body, and the two ends of sensor main body have and are used for fixing the connection external screw thread.
3. boiler wind powder on-Line Monitor Device according to claim 2, it is characterized in that described measuring wind speed probe is by firm banking, wind speed probe, constitutes from the assembling of deashing rod, the wind speed probe is the backing tube of fixed in position on fixed head, fixed head is installed in an end of firm banking, is suspended in the backing tube from the deashing rod.
4. according to claim 1,2 or 3 described boiler wind powder on-Line Monitor Device, it is characterized in that described is to be composed in series by backing tube nut, steel wire, shackle and vibration bloom from the deashing rod.
5. boiler wind powder on-Line Monitor Device according to claim 4 is characterized in that described temperature sensor is the platinum resistance thermometer sensor, sensor.
6. boiler wind powder on-Line Monitor Device according to claim 5, it is characterized in that described fixed head and backing tube junction are welded seal, airtight pressure testing is 2.5MPa, the assembling that closely cooperates of insulating sleeve and measurement electrode and insulating sleeve and sensor main body, and airtight pressure testing is 2.5MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201394326U CN201032160Y (en) | 2007-02-13 | 2007-02-13 | Boiler wind powder online monitoring device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007201394326U CN201032160Y (en) | 2007-02-13 | 2007-02-13 | Boiler wind powder online monitoring device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201032160Y true CN201032160Y (en) | 2008-03-05 |
Family
ID=39164049
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007201394326U Expired - Lifetime CN201032160Y (en) | 2007-02-13 | 2007-02-13 | Boiler wind powder online monitoring device |
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| Country | Link |
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| CN (1) | CN201032160Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822669A (en) * | 2014-03-19 | 2014-05-28 | 山西大学 | Pulverized coal online monitoring method of boiler |
| CN106247393A (en) * | 2016-08-01 | 2016-12-21 | 国网河北省电力公司电力科学研究院 | A kind of machine supplying powder is overcome to break the generator group coordination control strategy of powder |
| CN106771047A (en) * | 2016-12-16 | 2017-05-31 | 华北电力大学 | A kind of coal dust moisture content and coal monitoring device and method based on multisensor |
| CN110530434A (en) * | 2019-10-09 | 2019-12-03 | 北京华电天仁电力控制技术有限公司 | A kind of coal dust pulverized coal feed pipe apoplexy powder speed and coal powder density self-operated measuring unit |
| CN113109226A (en) * | 2021-05-18 | 2021-07-13 | 中国铁路设计集团有限公司 | Snow particle concentration measuring device and measuring method |
| CN114184222A (en) * | 2021-10-11 | 2022-03-15 | 华能(浙江)能源开发有限公司玉环分公司 | Powder accumulation fire prevention detection method and device for pulverized coal pipe |
-
2007
- 2007-02-13 CN CNU2007201394326U patent/CN201032160Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103822669A (en) * | 2014-03-19 | 2014-05-28 | 山西大学 | Pulverized coal online monitoring method of boiler |
| CN106247393A (en) * | 2016-08-01 | 2016-12-21 | 国网河北省电力公司电力科学研究院 | A kind of machine supplying powder is overcome to break the generator group coordination control strategy of powder |
| CN106771047A (en) * | 2016-12-16 | 2017-05-31 | 华北电力大学 | A kind of coal dust moisture content and coal monitoring device and method based on multisensor |
| CN106771047B (en) * | 2016-12-16 | 2023-08-29 | 华北电力大学 | Multi-sensor-based pulverized coal water content and coal type monitoring device and method |
| CN110530434A (en) * | 2019-10-09 | 2019-12-03 | 北京华电天仁电力控制技术有限公司 | A kind of coal dust pulverized coal feed pipe apoplexy powder speed and coal powder density self-operated measuring unit |
| CN113109226A (en) * | 2021-05-18 | 2021-07-13 | 中国铁路设计集团有限公司 | Snow particle concentration measuring device and measuring method |
| CN114184222A (en) * | 2021-10-11 | 2022-03-15 | 华能(浙江)能源开发有限公司玉环分公司 | Powder accumulation fire prevention detection method and device for pulverized coal pipe |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Shedi Inventor after: Li Xiaohua Inventor before: Zhang Shedi Inventor before: Li Jicheng Inventor before: Li Xiaohua |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: ZHANG SHEDI LI JICHENG LI XIAOHUA TO: ZHANG SHEDI LI XIAOHUA |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20080305 |