CN204789462U - Buggy concentration and velocity of flow on line measurement system in one time tuber pipe is said - Google Patents
Buggy concentration and velocity of flow on line measurement system in one time tuber pipe is said Download PDFInfo
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- CN204789462U CN204789462U CN201520477961.1U CN201520477961U CN204789462U CN 204789462 U CN204789462 U CN 204789462U CN 201520477961 U CN201520477961 U CN 201520477961U CN 204789462 U CN204789462 U CN 204789462U
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Abstract
The utility model discloses a buggy concentration and velocity of flow on line measurement system in one time tuber pipe is said, including tuber pipe way, sensor A, sensor B, signal conditioning unit A, signal conditioning unit B and an industrial computer data acquisition and a processing unit, signal conditioning unit A and sensor A electricity even, signal conditioning unit B and sensor B electricity even, and signal conditioning unit A is with signal conditioning unit B all with industrial computer data acquisition and processing unit is electric links, 120 even sensor A of installation at the every interval on the perpendicular in a tuber pipe is said install 3 sensor A, just altogether 3 individual sensor A is through the parallelly connected back output signal of a bronze medal axle cable, sensor B is for setting up two static test probe that the characteristic is the same in a tuber pipe is said, sensor A and sensor B are electrostatic transducer. The utility model provides an on line measurement system of the buggy concentration and the velocity of flow in can tuber pipe of accurate measurement.
Description
Technical field
The utility model relates to a kind of on-line measurement system, particularly relates to coal powder density and flow velocity on-line measurement system in a kind of First air pipeline, belongs to coal dust field of measuring technique.
Background technology
At present, the primary air velocity in power boiler burning process and air quantity, the ratio between the pulverized coal flow of each burner and wind coal dust, directly affects the combustion conditions of boiler and the burning efficiency of boiler, the content having three aspects that power plant operations staff pays close attention to:
1), in combustion certain coal pipe powder amount is too much, and the resistance of ducting increases, and air quantity reduces, and coal dust deposition then can occur, and even plugging, disconnected powder jeopardize safe operation and cause fire extinguishing;
2), coal dust i.e. coal powder density on the high side too high time, form not enough reducing atmosphere district near burner, the temperature of fusion of ash is reduced, thus causes local slagging scorification, therefore need the means of detectable concentration and speed, this is that boiler realizes Optimizing Combustion and realizes low NO
xthe most important condition of burning;
3), coal dust flow velocity: according to foreign literature report, coal air mixture, in the size of boiler-burner velocity of discharge, except affecting in flying dust except carbon content, also can affect carbon monoxide in flue gas (CO) and oxynitrides (NO at double
x) concentration, these gas exists has much relations to the pitting corrosion of the high temperature corrosion in stove and superheater, economizer and environmental pollution.
Comprehensive above analysis, in order to Optimizing Combustion, the booster avoid the scaling loss of burner, avoid water-cooling wall or other region cokings, avoided thermal load inequality to cause, avoid reducing atmosphere under localized hyperthermia's burn into help operations staff to understand the state of each pulverized coal channel pulverized coal flow, when there is stifled powder, operations staff can accurately locate, the risk of minimizing accident, just must have detection means accurately and reliably.
Due to First air Bottomhole pressure is high speed pulverized coal borne air flow, by the differential pressure method measuring wind of routine, can't resolve wearing and tearing and blocked problem.And because straight blown converter coal mill system structure is special, conventional energy conservation principle cannot be used to carry out measurement of concetration, and as adopted microwave technology and correlation method detectable concentration, then in pipeline, accumulated powder easily causes detecting unsuccessfully, hardware cost is higher, detection means serious wear.
Utility model content
Fundamental purpose of the present utility model is the problems referred to above in order to exist when solving current coal powder density and fluid-velocity survey, provide a kind of can the on-line measurement system of coal powder density and flow velocity in Measurement accuracy primary air piping.
The purpose of this utility model can reach by adopting following technical scheme:
Coal powder density and flow velocity on-line measurement system in a kind of First air pipeline, comprise First air pipeline, sensors A and sensor B, described sensors A and sensor B are arranged in First air pipeline; In described First air pipeline, coal powder density and flow velocity on-line measurement system also comprise signal condition unit A, signal condition unit B and industrial computer data Acquire and process unit; Described signal condition unit A and sensors A are electrically connected, and signal condition unit B and sensor B are electrically connected, and signal condition unit A and signal condition unit B are all electrically connected with industrial computer data Acquire and process unit; Described First air pipeline is circular pipe, and the vertical plane of described circular pipe installs a sensors A uniformly at interval of 120 °, install 3 sensors A altogether, and described 3 sensors A is by outputing signal after a coaxial cable parallel connection; Described sensor B is the electrostatic detection probe that two characteristics be arranged in First air pipeline are identical.
As a kind of preferred version, described sensors A and sensor B are electrostatic transducer.
As a kind of preferred version, described sensors A is for measuring the induction current of charged coal dust particle in First air pipeline, described induction current sends into industrial computer data Acquire and process unit after signal condition unit A filtering, shaping, amplification, exports coal powder density ρ c after described industrial computer data Acquire and process cell processing.
As a kind of preferred version, described sensor B is for measuring in First air pipeline fricative electrostatic signal between charged coal dust particle, described electrostatic signal sends into industrial computer data Acquire and process unit after the induction of signal condition unit B, amplification, filtering, exports coal dust flow velocity Vc after described industrial computer data Acquire and process cell processing.
Advantageous Effects of the present utility model:
1, the utility model is on the vertical plane in wind powder pipe road, be separated by 120 degree and 3 sensors are installed, and by outputing signal after a coaxial cable parallel connection, obviously when the wind powder mixture mass rate flowing through sensor is larger, signal is larger, and the speed that effectively can combine the coal dust measured just can measure coal powder density.
2, the utility model is for steam generator system, on-line measurement must be carried out to the pulverized coal flow in each wind powder pipe road, coal-air ratio balance in each burner is made to obtain on-line optimization, and by measuring charge variation during two-phase flow transmission in wind powder pipe, use these signals to determine the characteristic of pulverized coal flow.
3, on-line measurement system of the present utility model can measure the relative distribution situation of the coal dust in each wind powder pipe, in addition, pass through Operation system setting, the flow velocity of pulverized coal flow in each pipe and absolute flow rate can also be measured, making burning optimization to the accurate detection of pulverized coal flow, is the key realizing harmonious combustion.
4, the data acquisition of on-line measurement system of the present utility model can monitor the wild effect of pulverized coal flow in wind powder pipe, this wild effect likely makes boiler operatiopn go wrong, these signal datas can also be used to the not enough wind powder pipe coal dust alluvial caused of First air detected because coal pulverizer comes, and signal can also be used for detecting in wind powder pipe road the emergency situations causing furnace pressure and exhaust emissions fluctuation.
5, on-line measurement system of the present utility model has following outstanding advantages: 1) all signals are all online and continuous print, and reflecting time is exceedingly fast, and reflecting time is in 1s; 2) system does not affect by coal dust type, humidity, ash content and coal dust stickiness; 3) installation process is simple, and coal pulverizer idle time is short; 4) the working sensor time is long, and stream time ensures at 2-3.
Accompanying drawing explanation
Fig. 1 is the system composition schematic diagram of the utility model on-line measurement system.
In figure: 1-sensors A, 2-sensor B, 3-First air pipeline, 4-signal condition unit A, 5-industrial computer data Acquire and process unit, 6-signal condition unit B.
Embodiment
For make those skilled in the art clearly with clear and definite the technical solution of the utility model, below in conjunction with embodiment and accompanying drawing, the utility model is described in further detail, but embodiment of the present utility model is not limited thereto.
As shown in Figure 1, coal powder density and flow velocity on-line measurement system in a kind of First air pipeline, comprise First air pipeline 3, sensors A 1 and sensor B2, and described sensors A 1 and sensor B2 are arranged in First air pipeline 3; In described First air pipeline, coal powder density and flow velocity on-line measurement system also comprise signal condition unit A4, signal condition unit B 6 and industrial computer data Acquire and process unit 5; Described signal condition unit A4 and sensors A 1 are electrically connected, and signal condition unit B 6 and sensor B2 are electrically connected, and signal condition unit A4 and signal condition unit B 6 are all electrically connected with industrial computer data Acquire and process unit 5; Described First air pipeline 3 is circular pipe, and the vertical plane of described circular pipe installs a sensors A 1 uniformly at interval of 120 °, install 3 sensors A 1 altogether, and described 3 sensors A 1 is by outputing signal after a coaxial cable parallel connection; Described sensor B2 is the electrostatic detection probe that two characteristics be arranged in First air pipeline 3 are identical.
As a kind of preferred version of the present embodiment, described sensors A 1 and sensor B2 are electrostatic transducer, described sensors A 1 is for measuring the induction current of charged coal dust particle in First air pipeline 3, described induction current sends into industrial computer data Acquire and process unit 5 after signal condition unit A4 filtering, shaping, amplification, and described industrial computer data Acquire and process unit 5 processes rear output coal powder density ρ c.
As a kind of preferred version of the present embodiment, described sensor B2 is for measuring in First air pipeline 3 fricative electrostatic signal between charged coal dust particle, described electrostatic signal is responded to through signal condition unit B 6, amplify, send into industrial computer data Acquire and process unit 5 after filtering, and described industrial computer data Acquire and process unit 5 processes rear output coal dust flow velocity Vc.
The principle of electric charge induction commercial measurement coal powder density ρ c:
Coal cinder is polished in coal pulverizer, be rolled in the process of pulverized coal particle, and coal dust is in process of pneumatic transmission, powder granule always will collide with tube wall, rub and be separated, between powder granule and particle, also to collide, rub and be separated, close contacts a large amount of like this and the process be separated, a considerable amount of static charge on powder band can be made, charged pulverized coal particle can produce certain electrostatic field, when charged coal dust particle is by sensors A, the sensors A surface be in electrostatic field produces equivalent induced charge, when a large amount of charged coal dust flows through sensors A, sensors A forms induction current, faradic size is relevant with the pulverized coal mass flow flowing through sensors A, using induction current as measuring-signal, induction current is through signal condition unit A filtering, shaping, industrial computer data Acquire and process unit is sent into after amplifying, industrial computer data Acquire and process unit processes this signal and analyzes, just can obtain the concentration signal of coal dust, export coal powder density ρ c.
The principle of electric charge induction commercial measurement coal dust flow velocity Vc:
Two characteristic sensor B that are identical, a segment distance apart are installed in pulverized coal channel, when coal dust is by pipeline, due to the friction between pulverized coal particle, create electrostatic, the change of electrostatic causes the output signal Vx (t) of two place sensor B and the change of Vy (t), signal sends into industrial computer data Acquire and process unit after the induction of signal condition unit B, amplification, filtering, industrial computer data Acquire and process unit carries out relevant treatment to signal, and process obtains associated flow rate Vc.
In sum, the utility model is on the vertical plane in wind powder pipe road, be separated by 120 degree and 3 sensors are installed, and by outputing signal after a coaxial cable parallel connection, obviously when the wind powder mixture mass rate flowing through sensor is larger, signal is larger, and the speed that effectively can combine the coal dust measured just can measure coal powder density.
The utility model is for steam generator system, on-line measurement must be carried out to the pulverized coal flow in each wind powder pipe road, make coal-air ratio balance in each burner obtain on-line optimization, and by measuring charge variation during two-phase flow transmission in wind powder pipe, use these signals to determine the characteristic of pulverized coal flow.
On-line measurement system of the present utility model can measure the relative distribution situation of the coal dust in each wind powder pipe, in addition, by Operation system setting, the flow velocity of pulverized coal flow in each pipe and absolute flow rate can also be measured, making burning optimization to the accurate detection of pulverized coal flow, is the key realizing harmonious combustion.
The data acquisition of on-line measurement system of the present utility model can monitor the wild effect of pulverized coal flow in wind powder pipe, this wild effect likely makes boiler operatiopn go wrong, these signal datas can also be used to the not enough wind powder pipe coal dust alluvial caused of First air detected because coal pulverizer comes, and signal can also be used for detecting in wind powder pipe road the emergency situations causing furnace pressure and exhaust emissions fluctuation.
On-line measurement system of the present utility model has following outstanding advantages: 1) all signals are all online and continuous print, and reflecting time is exceedingly fast, and reflecting time is in 1s; 2) system does not affect by coal dust type, humidity, ash content and coal dust stickiness; 3) installation process is simple, and coal pulverizer idle time is short; 4) the working sensor time is long, and stream time ensures at 2-3.
The above; be only the utility model patent preferred embodiment; but the protection domain of the utility model patent is not limited thereto; anyly be familiar with those skilled in the art in the scope disclosed in the utility model patent; be equal to according to the technical scheme of the utility model patent and design thereof and replaced or change, all belonged to the protection domain of the utility model patent.
Claims (4)
1. coal powder density and flow velocity on-line measurement system in a First air pipeline, comprise First air pipeline (3), sensors A (1) and sensor B (2), described sensors A (1) and sensor B (2) are arranged in First air pipeline (3); It is characterized in that: in described First air pipeline, coal powder density and flow velocity on-line measurement system also comprise signal condition unit A (4), signal condition unit B (6) and industrial computer data Acquire and process unit (5); Described signal condition unit A (4) and sensors A (1) are electrically connected, signal condition unit B (6) and sensor B (2) are electrically connected, and signal condition unit A (4) and signal condition unit B (6) are all electrically connected with industrial computer data Acquire and process unit (5); Described First air pipeline (3) is circular pipe, the vertical plane of described circular pipe installs a sensors A (1) uniformly at interval of 120 °, altogether 3 sensors A (1) are installed, and described 3 sensors A (1) are by outputing signal after a coaxial cable parallel connection; Described sensor B (2) is for being arranged on the identical electrostatic detection probe of two characteristics in First air pipeline (3).
2. coal powder density and flow velocity on-line measurement system in a kind of First air pipeline according to claim 1, is characterized in that: described sensors A (1) and sensor B (2) are electrostatic transducer.
3. coal powder density and flow velocity on-line measurement system in a kind of First air pipeline according to claim 1 and 2, it is characterized in that: described sensors A (1) is for measuring the induction current of charged coal dust particle in First air pipeline (3), described induction current sends into industrial computer data Acquire and process unit (5) after signal condition unit A (4) filtering, shaping, amplification, exports coal powder density ρ c after described industrial computer data Acquire and process unit (5) process.
4. coal powder density and flow velocity on-line measurement system in a kind of First air pipeline according to claim 1 and 2, it is characterized in that: described sensor B (2) is for measuring fricative electrostatic signal between the interior charged coal dust particle of First air pipeline (3), described electrostatic signal sends into industrial computer data Acquire and process unit (5) after signal condition unit B (6) induction, amplification, filtering, exports coal dust flow velocity Vc after described industrial computer data Acquire and process unit (5) process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520477961.1U CN204789462U (en) | 2015-06-30 | 2015-06-30 | Buggy concentration and velocity of flow on line measurement system in one time tuber pipe is said |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520477961.1U CN204789462U (en) | 2015-06-30 | 2015-06-30 | Buggy concentration and velocity of flow on line measurement system in one time tuber pipe is said |
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| CN204789462U true CN204789462U (en) | 2015-11-18 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN108931664A (en) * | 2018-09-03 | 2018-12-04 | 南京科远自动化集团股份有限公司 | First air on-line parameter measuring system and measurement method |
| CN109187295A (en) * | 2018-09-03 | 2019-01-11 | 南京科远自动化集团股份有限公司 | First air on-line system for measuring the densities and measurement method |
| CN112325956A (en) * | 2020-10-12 | 2021-02-05 | 南京中宇自动化有限公司 | Induction type high-temperature gas-solid two-phase flow measuring instrument and measuring method thereof |
-
2015
- 2015-06-30 CN CN201520477961.1U patent/CN204789462U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| 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 |
| CN108931664A (en) * | 2018-09-03 | 2018-12-04 | 南京科远自动化集团股份有限公司 | First air on-line parameter measuring system and measurement method |
| CN109187295A (en) * | 2018-09-03 | 2019-01-11 | 南京科远自动化集团股份有限公司 | First air on-line system for measuring the densities and measurement method |
| CN112325956A (en) * | 2020-10-12 | 2021-02-05 | 南京中宇自动化有限公司 | Induction type high-temperature gas-solid two-phase flow measuring instrument and measuring method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20151118 Termination date: 20210630 |