CN201653845U - Power station boiler coal dust concentration measuring instrument - Google Patents
Power station boiler coal dust concentration measuring instrument Download PDFInfo
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- CN201653845U CN201653845U CN2010201400865U CN201020140086U CN201653845U CN 201653845 U CN201653845 U CN 201653845U CN 2010201400865 U CN2010201400865 U CN 2010201400865U CN 201020140086 U CN201020140086 U CN 201020140086U CN 201653845 U CN201653845 U CN 201653845U
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- coal dust
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Abstract
The utility model provides a power station boiler coal dust concentration measuring instrument, which comprises a measuring probe and a main machine, wherein the main machine comprises a control unit and a display unit. The output of the measuring probe is connected with the input of the control unit, and the output of the control unit is connected with the input of the display unit. The measuring instrument adopts the singlechip technology and the sensor technology to be used with the pressure drop coal dust concentration measuring probe, so a set of complete coal dust concentration on-line monitoring system can be realized. The measuring instrument can realize intelligent, digitalized and integrated function, can simultaneously measure the coal dust concentration and air speed in a primary air pipeline of a power plant boiler, and has the advantages of reduced cost, fast and convenient installation, visual data observation and the like.
Description
Technical field
The utility model is relevant for a kind of thermal measurement instrument, and particularly relevant for the measurement instrument of coal powder density and speed in a kind of station boiler primary wind and powder pipeline.
Background technology
In thermal power plant's energy conversion process, boiler changes the chemical energy of fuel the heat energy of steam into, and the quality of boiler combustion operating mode is determining the economy and the security of boiler plant and the operation of whole generating factory to a great extent.
Burning optimization is the needs of boiler operatiopn security: it is improper that burning is adjusted, and can cause problems such as eccentricity of fire in the burner hearth, overlap, ignition point position are unreasonable, burner region coking, temperature deviation, oxygen amount deviation.Burning optimization is the requirement of boiler operatiopn economy: in the thermoelectricity cost of electricity-generating, fuel cost accounts for more than 70%, and burning optimization can reduce flue gas loss and incomplete combustion loss, thereby improves boiler operating efficiency.
Measure at coal powder density, released the different scheme of measuring principle both at home and abroad, as laser method, microwave method, capacitance method, temperature differential method, pressure decline method etc.Laser method, microwave method, capacitance method are owing to have relatively high expectations to on-the-spot running environment, and all very high to the humidity requirement of coal and coal dust, after running environment or coal variation, measuring error is bigger, so be difficult to carry out application widely; Though and temperature differential method has certain application, it is not high that but it is suitable for the ball type pulverizer system and boiler and the measuring accuracy moved in the pulverized coal carried by hot air mode, it is bigger that measurement data lags behind, and also limited its scope of applying, and the directive function of burning optimization is also decreased.And the pressure decline method measuring accuracy is higher, and the measurement data real-time is good, can in time reflect the flow state in the pipeline, has development prospect preferably.
Summary of the invention
In view of this, the utility model provides a kind of intellectuality, digitizing, incorporate power boiler breeze concentration measurement instrument, can measure the interior coal powder density and the wind speed of primary wind and powder pipeline of boiler of power plant simultaneously.
The utility model proposes a kind of power boiler breeze concentration measurement instrument, comprise measuring sonde and main frame.Wherein, measuring sonde comprises pressure probe and temperature sensor, and main frame comprises control module and display unit.The output of measuring sonde is connected to the input of control module, and the output of control module connects the input of display unit.
In the utility model, described measuring sonde comprises 2 pressure probes and 1 temperature sensor.Further, described pressure probe comprises stagnation pressure pressure pipe and static pressure pressure pipe, and described stagnation pressure pressure pipe is the upper end sealing, and the lower end is provided with the tubular body of curved profile mouth; Static pressure pressure pipe is the tubular body of upper end sealing, bottom end opening; The top of stagnation pressure pressure pipe and static pressure pressure pipe is oblique cutting secondary filter chamber respectively; One end opening of secondary filter chamber and respectively with the internal communication of stagnation pressure pressure pipe, static pressure pressure pipe, its other end sealing; The secondary filter chamber is connected with pressure guiding pipe by the impulse joint.
In the utility model, the side that described stagnation pressure pressure pipe has the curved profile mouth helps obtaining pressure measuring value towards the windward side, and static pressure pressure pipe is arranged at the back side of stagnation pressure pressure pipe.
In the utility model, described control module is the MSP430F169 single-chip microcomputer.
The beneficial effects of the utility model are, this instrument at present pressure decline method coal powder density measuring system sensing, become give, deficiency that Model Calculation, standard signal output etc. partly exist, adopt singlechip technology, sensor technology, supporting pressure decline method coal powder density measuring sonde can be realized the complete coal powder density on-line monitoring system of a cover.This instrument can realize intellectuality, digitizing, integrated, can measure coal powder density and wind speed in the primary wind and powder pipeline of boiler of power plant simultaneously, has advantage such as reduce cost, convenience quick for installation, observed data are directly perceived.
Description of drawings
Figure 1 shows that functional block diagram according to power boiler breeze concentration measurement instrument of the present utility model.
Figure 2 shows that the structural representation of the pressure probe among Fig. 1.
Figure 3 shows that the synoptic diagram that on an airduct road, installs and measures probe.
Figure 4 shows that the main frame rear interface figure among Fig. 1.
Figure 5 shows that the circuit theory diagrams of the control module among Fig. 1.
Embodiment
For above-mentioned and other purpose, feature and advantage of the present utility model can be become apparent, preferred embodiment cited below particularly, and conjunction with figs. are described in detail below.
In conjunction with Fig. 1～Fig. 5, power boiler breeze concentration measurement instrument provided by the utility model comprises measuring sonde 10 and main frame 11.Its course of work mainly is divided into three processes: raw data acquisition, data-switching and computing, output result.Measuring sonde 10 comprises pressure probe 100 and temperature sensor 101, and promptly data acquisition is divided into pressure acquisition and temperature acquisition.Specifically, comprise 2 pressure probes 100 and 1 temperature sensor 101 in the utility model.
As shown in Figure 2, each pressure probe 100 comprises stagnation pressure pressure pipe 102, static pressure pressure pipe 103, secondary filter chamber 104, impulse joint 105 and pressure guiding pipe 106.Wherein, stagnation pressure pressure pipe 102 is the upper end sealing, and the lower end is provided with the tubular body of curved profile mouth.In the utility model, the lower end of stagnation pressure pressure pipe 102 has the section mouth of class S shape, and the pressure effect is better.The top oblique cutting of stagnation pressure pressure pipe 102 has secondary filter chamber 104.The internal communication of one end of secondary filter chamber 104 and stagnation pressure pressure pipe 102, the other end seals and is directed upwardly.Secondary filter chamber 104 is provided with impulse joint 105, in order to connect pressure guiding pipe 106.
Static pressure pressure pipe 103 is upper end sealing, the tubular body of bottom end opening.Be similar to stagnation pressure pressure pipe 102, secondary filter chamber 104 is arranged at the top of static pressure pressure pipe 103 also oblique cutting.The internal communication of one end of secondary filter chamber 104 and static pressure pressure pipe 103, the other end seals and is directed upwardly.Also be provided with impulse joint 105 on the secondary filter chamber 104.
As shown in Figure 2, in the tube chamber of stagnation pressure pressure pipe 102 and static pressure pressure pipe 103, be equipped with anti-block apparatus 107.In the utility model, anti-block apparatus 107 can be selected structure of the prior art for use.When mounted, two effective flanges 108 of pressure connect.The lower port of two pressure pipes is located in the straight tube of airduct 2, and the curved profile mouth of stagnation pressure pressure pipe 102 is towards the windward side of airduct 2, and static pressure pressure pipe 103 is arranged on the back side of stagnation pressure pressure pipe 102.
As shown in Figure 3, the utility model in use, 2 pressure probes 100 are installed in order to gather pressure on the primary wind and powder pipeline of boiler of power plant, one of them pressure probe 100 is installed in total head pipeline (be called and mix preceding high pressure) and the static pressure pipeline (be called and mix preceding low pressure) before the powder, for example is installed in the P1P2 place among Fig. 3.The pressure of gathering by stagnation pressure pressure pipe is total head P1 before mixing, and the pressure that static pressure pressure pipe is gathered is static pressure P2 before mixing; Another pressure probe 100 is installed in total head pipeline (be called and mix the back high pressure) and the static pressure pipeline (be called and mix back low pressure) behind the powder, for example is installed in the P3P4 place among Fig. 3.The pressure of gathering by stagnation pressure pressure pipe is total head P3 after mixing, and the pressure that static pressure pressure pipe is gathered is for mixing back static pressure P4.
The temperature acquisition process, on the pipeline before the primary wind and powder pipeline of boiler falls powder mounting temperature sensor 101 in order to the collecting temperature signal, the T place among Fig. 3 for example.In the utility model, temperature sensor 101 can be selected PT100 thermal resistance of the prior art for use, in the form input main frame 11 of the temperature that sensor records with resistance.
In conjunction with Fig. 1 and Fig. 4, measuring sonde 10 is connected with the interface of main frame 11, and pressure signal and the temperature signal that measures gone out to deliver to main frame 11.As shown in Figure 4,3 of the PT100 sensor wiring A, B, C receive respectively on A, B, the C binding post of main frame 11.P1 on the main frame 11, P2, P3, P4 are corresponding with pressure probe 100 respectively.
In the utility model, main frame 11 comprises control module 110, A/D change-over circuit 111, voltage conversion circuit 112, differential pressure transmitter 113 and display unit 114.Said units all can be selected the circuit that can realize identical function in the prior art for use.Further, control module 110 can be selected the MSP430F169 single-chip microcomputer for use, Figure 5 shows that the circuit theory diagrams of this single-chip microcomputer.
Principle of work of the present utility model is: at first main frame 11 signal that measuring sonde 10 is collected is converted into calculating voltage signal that need, that single-chip microcomputer can receive.Specifically, the signal that temperature sensor 101 collects is a resistance signal, is converted to voltage signal by voltage conversion circuit 112.Four road pressure signals that 2 pressure probes 100 collect are divided into three groups after inserting main frame 11, enter three differential pressure transmitters 113.These three groups of voltages are respectively: a, the preceding high pressure of mixing and the preceding low pressure of mixing, low pressure after b, the preceding low pressure of mixing and the mixing, low pressure after high pressure and the mixing after c, the mixing.After these three groups of data enter differential pressure transmitter 113,, be respectively and mix preceding differential pressure, front and back differential static pressure, mixing back differential pressure with the voltage form output of 0-5V.
Three road differential pressure signals and one road temperature signal are converted into digital signal and enter control module 110 by A/D change-over circuit 111.Data through after calculating, obtain the data of coal powder density and air velocity duct in single-chip microcomputer, the result puts into storer.
The result of output can be divided into dual mode, a kind of be by display unit 114 show, a kind of be to export with the 4-20mA current forms.In the utility model, display unit 114 is a liquid crystal display, and the result data of coal powder density and wind speed is shown that on the liquid crystal display of coal powder density transmitter this way of output can be found out the result very intuitively.The electric current output form is that the single-chip microcomputer result calculated is become voltage signal by D/A conversion, and voltage signal is changing current signal into by constant-current circuit, and the electric current way of output relatively is fit to the collection of most of industrial industry control machines.
Concrete case study on implementation only is a preferable case study on implementation of the present utility model described in the utility model, is not to be used for limiting practical range of the present utility model.Be that all equivalences of doing according to the content of the utility model claim change and modification, all should be as technology category of the present utility model.
Claims (5)
1. power boiler breeze concentration measurement instrument, comprise measuring sonde and main frame, it is characterized in that, measuring sonde comprises pressure probe and temperature sensor, main frame comprises control module and display unit, the output of measuring sonde is connected to the input of control module, and the output of control module connects the input of display unit.
2. power boiler breeze concentration measurement instrument according to claim 1 is characterized in that, described measuring sonde comprises 2 pressure probes and 1 temperature sensor.
3. power boiler breeze concentration measurement instrument according to claim 2 is characterized in that, described pressure probe comprises stagnation pressure pressure pipe and static pressure pressure pipe, and described stagnation pressure pressure pipe is the upper end sealing, and the lower end is provided with the tubular body of curved profile mouth; Static pressure pressure pipe is the tubular body of upper end sealing, bottom end opening; The top of stagnation pressure pressure pipe and static pressure pressure pipe is oblique cutting secondary filter chamber respectively; One end opening of secondary filter chamber and respectively with the internal communication of stagnation pressure pressure pipe, static pressure pressure pipe, its other end sealing; The secondary filter chamber is connected with pressure guiding pipe by the impulse joint.
4. power boiler breeze concentration measurement instrument according to claim 3 is characterized in that, the side that described stagnation pressure pressure pipe has the curved profile mouth is towards the windward side, and static pressure pressure pipe is arranged at the back side of stagnation pressure pressure pipe.
5. power boiler breeze concentration measurement instrument according to claim 1 is characterized in that, described control module is the MSP430F169 single-chip microcomputer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201400865U CN201653845U (en) | 2010-03-24 | 2010-03-24 | Power station boiler coal dust concentration measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201400865U CN201653845U (en) | 2010-03-24 | 2010-03-24 | Power station boiler coal dust concentration measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201653845U true CN201653845U (en) | 2010-11-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201400865U Expired - Lifetime CN201653845U (en) | 2010-03-24 | 2010-03-24 | Power station boiler coal dust concentration measuring instrument |
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| CN (1) | CN201653845U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308106A (en) * | 2013-06-28 | 2013-09-18 | 公安部天津消防研究所 | Mass flowmeter for high-pressure inert gas extinguishing agent |
| CN109612529A (en) * | 2018-12-27 | 2019-04-12 | 广州市圣高测控科技有限公司 | A kind of measuring multiple parameters control pick-up wireless transmission integrated multi-functional instrument |
-
2010
- 2010-03-24 CN CN2010201400865U patent/CN201653845U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103308106A (en) * | 2013-06-28 | 2013-09-18 | 公安部天津消防研究所 | Mass flowmeter for high-pressure inert gas extinguishing agent |
| CN103308106B (en) * | 2013-06-28 | 2016-01-13 | 公安部天津消防研究所 | High-pressure inert gas fire extinguishing agent mass flowmeter |
| CN109612529A (en) * | 2018-12-27 | 2019-04-12 | 广州市圣高测控科技有限公司 | A kind of measuring multiple parameters control pick-up wireless transmission integrated multi-functional instrument |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP03 | Change of name, title or address |
Address after: 210009 room A808, World Trade Center, No. 67 Shanxi Road, Gulou District, Jiangsu, China Patentee after: Longkon wisdom Polytron Technologies Inc Address before: Gulou District of Nanjing city in Jiangsu province 210013 dinghuai Gate No. 12 window of the world software technology park Patentee before: Nanjing Luculent Software Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20101124 |
|
| CX01 | Expiry of patent term |