CN103941036B - Be applicable to vent wind speed measuring system and the method for the test of coal burner cold conditions - Google Patents
Be applicable to vent wind speed measuring system and the method for the test of coal burner cold conditions Download PDFInfo
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Abstract
The invention discloses the vent wind speed measuring system and the method that are applicable to the test of coal burner cold conditions, comprise vent wind speed measurement mechanism, data acquisition and data handling system and mobile platform system, the integrated micro-pressure transmitter of multichannel of data acquisition and data handling system delivered to the signal of measuring by the aerofoil profile survey wind element of described vent wind speed measurement mechanism by tube connector, signal is reached distributed data acquisition plate by the integrated micro-pressure transmitter of described multichannel, cursor sensor in described mobile platform system is also sent to distributed data acquisition plate by the signal recording, the unification of distributed data acquisition plate is delivered to data collecting instrument by data and is sent to computer after to data processing and further processes, computer also can send instruction to the hoistable platform controller of mobile platform system. realize automatically the measuring in all directions of vent wind speed in cold test, record and data processing, avoided testing crew high strength and dangerous test job in severe test environment completely.
Description
Technical field
The present invention relates to a kind of intelligent vent wind speed measuring system and method that is applicable to the test of coal burner cold conditions.
Background technology
In the various generation modes of China, still taking coal-fired thermal power generation as main, in 300MW and these main force's units of 600MW, the boiler of most of unit adopts tangential firing mode.
For the large-sized station boiler that adopts tangential firing mode, vent wind speed measurements before hot starting, hot start is that one saves time, laborsaving, efficient test method, and it can be used for the air distribution uniformity coefficient of definite boiler combustion system; Determine the air quantity characteristic of each damper; Determine the flow dynamic characteristic of burner; Understand the mixing situation of primary and secondary air etc. But at present conventional method of testing is: tester in stove with center line each point wind speed and the adherent wind speed of water-cooling wall in hand-held anemometer measurement vent wind speed, stove and then draw detailed furnace air power situation. Because all blower fans of boiler side all will turn round and coal pulverizer ventilation, in the time carrying out stove build-in test, in stove, situation is that wind speed is high, dust is many, temperature low (summer, temperature was high) is even if tester puts on respirator, anti-goggles, in the time finishing a cold test, after dust takes three or four days in nostril, ear etc., just can drain only, tester's health is caused to larger injury.
Be not difficult to find out the shortcomings such as current method of testing exists poor working environment, and labour intensity is large, tests length consuming time, and test accuracy is low from above analysis.
By literature search is found, the this respect of document measure to(for) vent wind speed does not have substantially, about the document of measuring wind speed mainly concentrates on two aspects: first aspect is for the instrument of measuring wind and means research, as Xie Guangquan, Qi Jin, Yao Xiu equality, Wind Speed of Boiler in Power Station on-line measurement element and application characteristic thereof [J], Shanghai University Of Electric Power's journal, 2006,22 (4): 330-332, Peng Yan, Zhang Hongsheng, Xu Fei etc., the analysis and research of vane Anemometer wind error and correction method [J], meteorological hydrology oceanographic instrumentation, 2003,2:1-11, KaganovE.IandA.M.Yaglom, ErrorsinWind-speedMeasurementbyRotationAnemometers[J], Bound-LayerMeteorology, 1976,10:15-34. etc., these documents are to be studied aspect the accuracy of measuring wind speed and practicality, and during cold test, for vent wind speed, measurement is not studied. the measurement this respect of the primary air velocity in airduct on the other hand, as Zhou Shoujun, Tang Jie, Guo Min, the research [J] of in-line monitor system for primary wind and powder in boiler for power station critical component, power-saving technology, 2006,5 (24): 434-436, Yang Xingsen, flow behavior and flow-speed measurement [J] in an airduct, Chinese journal of scientific instrument, 2006, 27 (6): 1194-1195 etc., this part document is mainly studied how by more accurate the measuring wind speed in an airduct, but because burner nozzle has become the various types such as deep or light separation, become and become increasingly complex, primary air velocity in airduct can not represent the situation of vent wind speed, being now airduct primary air velocity for the general service condition of primary air velocity can be used to the leveling between each airduct when the cold test, when hot, can be used to judge the height of primary air velocity, avoid causing because primary air velocity is too low plugging.
Retrieval is found: Yang little Kun, Guo Chaoling, Gao Xin, the development of climbing voluntarily wall machinery [J] of measuring for power station boiler burner spout cold conditions, boiler manufacture, 2012,2:1-7, this section of document introduce a kind of can be at the mechanical device of water-cooling wall surface self climbing, this machinery that climbs has replaced original staircase or hoistable platform on the other hand, does not relate to and how vent wind speed carried out accurately or automatically measure and data collection and analysis etc. in document.
Measure relevant patent by patent retrieval to the vent wind speed of cold conditions test and have two:
The self wall-climbing that patent 201120046520.8 is measured for power station boiler burner vent wind speed, this patent and document noted earlier " Yang little Kun; Guo Chaoling; Gao Xin; the development of climbing voluntarily wall machinery [J] of measuring for power station boiler burner spout cold conditions, boiler manufacture, 2012; 2:1-7 is consistent, do not remake commentary yet.
Patent 200410013940.0 automatic test system for boiler cold state tests and experimental technique thereof, this patent Introduction a kind of measuring system, it is poor that it adopts improved Pitot tube to measure the dynamic pressure of burner nozzle, then through wireless differential pressure transceiver, data delivered to microprocessor and carry out data processing. In this patent, having occurred several problems, is first that follow-on Pitot tube will be repaiied and installs that fixed angle requirement is higher and comparatively complexity of present burner nozzle is easy to make the setting angle of pibtot's tub to occur that deviation makes measurement result inaccurate; The secondth, system is very complicated, with the low NO of 300MW, one time wind snout is arranged 24,28 of overfire air ports, 16 of SOFA spouts, amount to 68 spouts, suppose two modified Pitot tubes for each spout, to adopt 136 Pitot tubes, the corresponding relation of differential pressure transceiver and Pitot tube is not described in this patent, if 4 corresponding differential pressure transceivers of Pitot tube, the quantity of differential pressure transceiver reaches 34, and generally speaking the equipment of required installation and removal is too huge; Thirdly that this patent does not illustrate for the processing of data for microprocessor, also not relevant explanation in the claims, because adopting Pitot tube, this patent measures vent wind speed, due to the inevitably obstruction of installation deviation or gaging hole, measurement data there will be relatively large deviation, therefore whether microprocessor in the time of deal with data, will to have basis for estimation to judge data reasonable, and then data are calculated as the value of averaging is calculated carrying out, or two-dimentional muzzle velocity distribution situation etc.; The 4th is that this patent adopts wireless differential pressure transceiver that measurement data is delivered to microprocessor, owing to being the iron structure of a relative closure at whole burner hearth, wireless signal is had to shield effectiveness, can reduce the result of use of wireless differential pressure transceiver. Therefore can find out that by above analysis this patent has more restriction or deficiency in actual applications.
Retrieval is found, carry out wind speed, the patent of measuring is more as patent 99248667.X wind speed/wind-warm syndrome measuring instrument, 200610005532.X gas-solid phase body pipeline mean flow rate measuring instrument, 200829224216.6 digital wind measurement sensor, 200910029970.3 power sensor and wind measurement method thereof, 200910147115.2 the wind speed experimental device based on flow measurement and test method, 200910307386.X wind speed measuring device, 200920072090.1 a large-sized boiler cold test is with loading and unloading fast Pitot tube, 201120161604.6 one kind for measuring wind, the device of wind direction, 201120347171.3 intelligent wind direction and wind velocity sensor, 201210491637.6 (201220636601.8) a kind of wind speed measuring device, 201220474547.1 one kind is utilized the hot-bulb formula airspeedometer of thermocouple, a 201300007098.9 multi-direction wind speed measuring device, 201310246381.7 the wind speed and wind measuring device based on static pressure principle, 201310246527.8 wind speed and wind measuring device, 201320165141.X combined type balance pipe measuring wind speed element etc., these patents be all for wind speed or air quantity measure and proposed unique structure or principle, there is fundamental difference with the vent wind speed measuring system that is applicable to the test of burner cold conditions, no longer do too much commentary at this.
Known by above analysis, by being measured, burner nozzle wind speed can effectively judge and analyze boiler thermal-state combustion position, but current enter field survey in stove by tester and concerning tester, exist again environment severe, the shortcomings such as labour intensity is large, and the measurement mechanism having is now too complicated, and measurement result is not easy to again safeguard or adjust while sometimes there is relatively large deviation, is therefore necessary to design a kind of simple structure, is convenient to safeguard and adjusts, measure and accurately and artificially participate in few basin mouth wind velocity measurement system.
Summary of the invention
The deficiency existing for solving prior art, the invention discloses the vent wind speed measuring system and the method that are applicable to the test of coal burner cold conditions, this system can gather the go forward side by side data processing of line correlation of each vent wind speed as required automatically, as calculated the ratio of momentum of wind and Secondary Air, calculate the Reynolds number of ventilation etc., in data acquisition, do not need tester to enter boiler internal and carry out any operation, the Constitution ratio of plant of this system is simpler, fairly simple aspect installing, dismantling and safeguard, easily operation.
For achieving the above object, concrete scheme of the present invention is as follows:
Be applicable to the vent wind speed measuring system of coal burner cold conditions test, comprise vent wind speed measurement mechanism, data acquisition and data handling system and mobile platform system, the integrated micro-pressure transmitter of multichannel of data acquisition and data handling system delivered to the signal of measuring by the aerofoil profile survey wind element of described vent wind speed measurement mechanism by tube connector, signal is reached distributed data acquisition plate by the integrated micro-pressure transmitter of described multichannel, cursor sensor in described mobile platform system is also sent to distributed data acquisition plate by the signal recording, the unification of distributed data acquisition plate is delivered to data collecting instrument by data and is sent to computer after to data processing and further processes, computer also can send instruction to the hoistable platform controller of mobile platform system.
Described vent wind speed measurement mechanism comprises aerofoil profile detecting element, the directed wing, support bar and tube connector, the described directed wing is fixed on aerofoil profile detecting element, the directed wing and aerofoil profile detecting element are arranged on support bar as one, and described tube connector is used for connecting aerofoil profile detecting element and the integrated micro-pressure transmitter of multichannel.
Described support bar adopts for ensureing that the rolling bearing that aerofoil profile detecting element freely rotates is connected with aerofoil profile detecting element.
Described data acquisition and data handling system comprise the integrated micro-pressure transmitter of multichannel, data collecting instrument and computer, the integrated micro-pressure transmitter of multichannel records aerofoil profile detecting element differential pressure signal and is converted to the analog signals of 4-20mA, and data collecting instrument is converted to digital quantity signal by the analog signals of 4-20mA and delivers to computer and carry out data processing.
Described signal comprises total head and static pressure signal.
Described tube connector comprises total head joint and the total head pressure tube corresponding with total head joint; Static pressure inlet and corresponding static pressure pressure tube.
Described mobile platform system comprises hoistable platform, suspension system and lifting platform control system, the centre of described hoistable platform and surrounding are taken the pavement 3 that is useful on installation, dismounting instrument and equipment, between the framework of described hoistable platform and furnace wall, leave gap and be provided with and prevent that framework from the directive wheel 2 of jam occurring between lifting process medium dip and furnace wall, described suspension system comprises suspension gear and hoist engine, and lifting platform control system is for controlling the lifting of hoistable platform.
Described lifting platform control system comprises cursor, cursor sensor and platform lifting controller, described cursor sticks on burner nozzle, described lifting platform controller is a PLC controller, accept cursor sensor and pass the signal of coming, the lifting of hoistable platform is controlled in the instruction of sending according to computer.
Described aerofoil profile is surveyed wind element and cursor sensor is all fixed on the angle of hoistable platform, is fixed on the horizontal center line that the cursor sensor on the angle of hoistable platform surveys wind element with aerofoil profile consistent.
The luvisde that described aerofoil profile is surveyed wind element is provided with total head gaging hole, side is provided with static opening, total head joint is connected on total head gaging hole, static pressure inlet is connected on static opening, the upper and lower that aerofoil profile is surveyed wind element is respectively provided with guide vane, be respectively guide vane and lower guide vane, aerofoil profile is surveyed wind element and is arranged on support bar, aerofoil profile is surveyed wind element and has been adopted upper bearing (metal) and lower bearing, metal (upper is to survey wind element for fixing aerofoil profile to ensure the very rotation of slight drag of aerofoil profile survey wind element simultaneously, the support bar base that aerofoil profile is surveyed wind element is provided with geometrical clamp, support bar base is adsorbed on pavement.
The vent wind speed measuring method that is applicable to the test of coal burner cold conditions, comprises the following steps:
Step 1: system initialization;
Step 2: manually boot hoistable platform by hoistable platform controller, then transfer hoistable platform controller to automated manner, hoistable platform is up motion automatically, when the cursor sensor at the each angle of hoistable platform is received first cursor signal, cursor sensor reaches signal distributed data acquisition plate and then delivers to data collecting instrument, data collecting instrument sends stop signal to hoistable platform controller, and cursor number is also counted as 1, also starts timing when meter;
Step 2: also signal is also delivered to computer when data collecting instrument sends stop signal to hoistable platform controller, measure and start, the differential pressure signal that each aerofoil profile survey wind element is measured is sent to the integrated micro-pressure sensor of multichannel, deliver to again distributed data acquisition plate, and then deliver to data collecting instrument, deliver to computer by data collecting instrument and process, computer also starts record data;
Step 3: when timing finishes, data collecting instrument sends enabling signal to hoistable platform controller, and hoistable platform starts rising automatically;
Step 4: when cursor sensor is received second cursor signal, cursor sensor reaches signal distributed data acquisition plate and then delivers to data collecting instrument, data collecting instrument sends stop signal to hoistable platform controller, and cursor number is also counted as 2, when meter, also start timing, and repeat step 2, three, in the time that data collecting instrument is received the cursor signal quantity of setting, when completing after record, first working condition measurement completes, and computer stops record data, and hoistable platform controller transfers control mode to manual mode and in halted state;
Step 5: adjust operating mode, just carry out the test of second operating mode after second Operating condition adjustment completes, then carry out the test of the 3rd operating mode, until whole test job completes.
System initialization specifically comprises that the definite value of hoistable platform controller is set, the definition of setting data frequency acquisition, and data name on computers, the setting of cursor quantity, the setting of test interval.
Beneficial effect of the present invention:
1, realized automatically the measuring in all directions of vent wind speed in cold test, record and data processing, avoided testing crew high strength and dangerous test job in severe test environment completely.
2, the equipment of this system is few, and installation and removal are simple.
3, in this system hardware, vent wind speed measuring cell adopts aerofoil profile to survey wind element and data in the directed wing and computer is housed and judges that these two aspects avoid the generation of measure error, the accuracy that ensures data, data reliability and accuracy that therefore this system records are higher.
4, this system is entirely automatic operation at work, does not need any participation of testing crew, has reduced human operational error, has improved system operation reliability, and test process is shorter.
5, at present large-sized station boiler all adopts hoistable platform to carry out working in stove in maintenance process, and therefore the hoistable platform described in this system kind can utilize installation preparation that existing hoistable platform makes this system still less completely, and time is shorter.
Brief description of the drawings
Fig. 1 burner nozzle wind velocity measurement system schematic diagram;
Fig. 2 burner nozzle wind velocity measurement system suspention connection diagram;
Fig. 3 aerofoil profile is surveyed wind component structure schematic diagram;
Fig. 4 aerofoil profile is surveyed wind element A-A to profile;
Fig. 5 aerofoil profile is surveyed the layout drawing of wind element on spout;
Fig. 6 DATA REASONING and transfer process figure;
The test flow chart of Fig. 7 vent wind speed measuring system;
In figure, 1, hoistable platform, 2, directive wheel, 3, pavement, 4, cursor sensor, 5, cursor, 6, burner nozzle, 7, aerofoil profile is surveyed wind element, 8, communication cable, 9, total head pressure tube, 10, static pressure pressure tube, 11, distributed data acquisition plate, 12, the integrated micro-pressure transmitter of multichannel, 13, data collecting instrument, 14, computer, 15, hoistable platform controller, 16, steel wire rope, 17, suspension pulley, 18, hoist engine, 19, geometrical clamp, 20, lower bearing, 21, static pressure inlet, 22, total head joint, 23, static opening, 24, total head gaging hole, 25, upper bearing (metal), 26, support bar, 27, upper guide vane, 28, lower guide vane, 29, support bar base.
Detailed description of the invention:
Below in conjunction with accompanying drawing, the present invention is described in detail:
Be applicable to the vent wind speed measuring system of coal burner cold conditions test, comprise vent wind speed measurement mechanism, data acquisition and data handling system and mobile platform system, vent wind speed measurement mechanism comprises aerofoil profile detecting element 7, the directed wing, support bar 26, tube connector. Wherein aerofoil profile detecting element 7 and the directed wing are made of one, and are arranged on support bar 26, and aerofoil profile detecting element 7 can rotate freely, and measure the dynamic pressure of spout air-flow deliver to data acquisition and processing system by aerofoil profile detecting element 7.
The speed measuring device that described aerofoil profile detecting element 7 is wing shapes for cross sectional shape, this speed measuring device can be measured total head and the static pressure of spout air-flow, total head and static pressure are delivered to the integrated micro-pressure transmitter 12 of multichannel by tube connector, this aerofoil profile detecting element 7 is non-standard component, need in wind-tunnel, demarcate.
The described directed wing is the guide vane being fixed on aerofoil profile detecting element, ensures that aerofoil profile detecting element, just to spout airflow direction, prevents from making measurement data inaccurate because deviation appears in aerofoil profile detecting element 7 directions.
Described support bar 26 is used for installing aerofoil profile detecting element 7, adopts light material as stainless steel tube, in order to ensure that freely rotating of aerofoil profile detecting element 7 adopts little rolling bearing.
Described tube connector is used for aerofoil profile detecting element 7 and the integrated micro-pressure transmitter 12 of multichannel, can adopt harder silicone tube.
Described data acquisition and data handling system comprise the integrated micro-pressure transmitter 12 of multichannel, data collecting instrument 13, computer 14 and data processing software.
The integrated micro-pressure transmitter 12 of described multichannel is converted to the signal of 4-20mA for aerofoil profile detecting element 7 is recorded to dynamic pressure. Rule of thumb know, spout air-flow records dynamic pressure scope between 0-800Pa by aerofoil profile detecting element 7, belongs to minute-pressure and obtains scope, can make multichannel micro-pressure transmitter 12, to reduce the quantity of pressure transmitter, reduces the equipment of system.
Described data collecting instrument 13 is converted to digital quantity by the analog signals of 4-20mA and delivers to computer 14 and carry out data processing.
Described data processing software is for vent wind speed measurement and cold test and the special data processing software designing, first this software judge measurement data, as required measurement data is processed to the VELOCITY DISTRIBUTION as nozzle exit, spout average speed, the baffle plate performance plot of Secondary Air and SOFA wind, and can carry out as required further data and calculate as the Re criterion numeral of gas stream in the stove, once, ratio of momentum etc. between secondary, three times and SOFA wind.
Described mobile platform system for vent wind speed system provide one can lifting and can automatically control the platform of lifting spacing, this mobile platform system comprises hoistable platform 1, suspension system, lifting platform control system.
Described hoistable platform 1 adopts light structures section bar, and middle and surrounding is taken simple pavement 3 for installing, dismantling instrument and equipment, and framework and furnace wall leave certain interval and load onto directive wheel 2 and prevent that framework between lifting process medium dip and furnace wall, jam occurring.
Described suspension system comprises suspension gear and hoist engine 18 and the auxiliary device thereof of framework, because vent wind speed measurement device is less and weight is lighter, is no more than 50kg, can adopt comparatively simple and reliable sus-pension according to field condition. Described auxiliary device mainly comprises the manual operator of steel wire rope 16, hoist engine 18 etc.
Described lifting platform control system comprises cursor 5, optical sensor and platform lifting controller, described cursor 5 be stick on burner nozzle 6 sides be used for metering and difference burner nozzle 6 mark, described lifting platform controller is that a PLC controller passes the signal of coming by accepting optical sensor, automatically control lifting platform according to instruction, aerofoil profile is surveyed wind element 7 and has been adopted upper bearing (metal) 25 and lower bearing 20.
For the boiler of various tangential firing modes, the basic building block of intelligent vent wind speed measuring system is the same, according to embodiment, intelligent vent wind speed measuring system is elaborated below.
Embodiment
The #3 of power plant of Hua electricity group boiler is subcritical, middle single reheat, the forced circulation drum boiler of evaporation capacity 1025t/h, combustion system is Terms of Corner Tangential Combustion, there are six layers of coal burner at every angle, arranges with overfire air port interval, and pulverized coal preparation system is join 6 medium-speed pulverizers direct-firing. This boiler-burner has adopted the technology of early stage U.S. CE, the concentration of emission of NOx is higher, in order to reach the up-to-date thermal power plant's pollutant emission standard of country, carry out low NO transformation, improved burner structure and layout are shown in Fig. 7, after transformation completes, carry out having adopted intelligent vent wind speed measuring system during cold test.
Power plant in boiler overhaul process in order to ensure in stove that faster construction speed has adopted hoistable platform 1 construct up and down in stove and make construction have higher safety guarantee (large-sized station boiler substantially all adopts hoistable platform 1 structure in stove at present) to facilitate, therefore on the basis of the original hoistable platform 1 of power plant, carry out in the present embodiment simple refit, then installation testing element is tested, and is elaborated below in conjunction with schematic diagram.
First hoistable platform 1 is as shown in Figure 1 cleared up, and confirm pavement 3 safety and install eight directive wheels 2 additional, to prevent hoistable platform 1 jam in lifting process, then to being installed on four of hoistable platform 1 angles, aerofoil profile surveys wind element 7 and cursor sensor 4, the quantity that aerofoil profile on each angle is surveyed wind element 7 can determine to install quantity according to the size of burner nozzle 6, each spout has been installed two aerofoil profiles survey wind elements 7 and (it should be noted that it is to make standard component that aerofoil profile is surveyed wind element 7 as shown in Figure 5 in the present embodiment, and demarcate in wind-tunnel, unless the comparatively special needs of spout are customized specially, then after having demarcated in wind-tunnel, install at the scene again), cursor 5 installation sites in Fig. 5, are also significantly indicated, cursor 5 adopts masking foil, adopt elongate in shape, every angle and every layer of burner nozzle 6 all will be pasted cursor 5, require high standard horizontal center line will with the horizontal center line of burner nozzle 6 always, cursor 5 vertical center lines of coal combustion device spout 6 correspondences at each angle will align, so that cursor sensor 4 can accurately be distinguished burning spout, cursor sensor 4 is installed one at each angle, totally four. eight aerofoil profiles survey wind element 7 (each angle are installed two) and four cursor sensors 4 are fixed on each angle of hoistable platform 1, the horizontal center line that simultaneously requires cursor sensor 4 to survey wind element 7 with aerofoil profile is consistent, as shown in Figure 5, the total head that aerofoil profile survey wind element 7 is measured is connected total head pressure tube 9 and static pressure pressure tube 10 and delivers to the integrated micro-pressure transmitter 12 of multichannel with static pressure inlet 21 by total head joint 22 with static pressure, by integrated micro-pressure transmitter, signal is reached to distributed data acquisition plate 11, cursor sensor 4 also transmits signals to distributed data acquisition plate 11, by data acquisition board unification, data are delivered to data collecting instrument 13, data collecting instrument 13 is small-sized microprocessors, it exports data to data processing backcasting machine 14, interrupt to be for further processing, and can send instruction etc. to hoistable platform controller 15. the data transmission procedure of intelligent vent wind speed measuring system can be as shown in Figure 6. hoistable platform controller 15 is by automatically and the start and stop of manual two kinds of mode control hoistable platforms 1, under automated manner, the start and stop of platform be according to Acquisition Instrument to signal deciding start and stop, the time interval is set according to test request, in the next complete start and stop by artificial mode control platform of manual mode, in order to ensure the safety of hoistable platform 1, on the superiors' burner nozzle 6, two limit switches are installed at 2 meters of, and in the time that platform is encountered limit switch, 1 of hoistable platform stops automatically. in Fig. 1, four aerofoil profiles are surveyed wind element 7 has pressure tube to be connected to the integrated micro-pressure sensor of multichannel, four cursor sensors 4 also have communication cable 8 to be connected to distributed data acquisition plate 11, in order to make schematic diagram clear, simple, therefore only schematically connected survey wind element and the cursor sensor 4 at #2 angle.
The suspention method of hoistable platform 1 is shown in Fig. 2, adopt steel wire rope 16 to suspend in midair, in this embodiment due to hoistable platform 1 to transport lot cargo adopt steel wire rope 16 thicker, a suspension pulley 17 is installed in pendant superheater position, steel wire rope 16 is connected on hoist engine 18 by manhole door, hoist engine 18 can manually be controlled lifting with manual operator, also can adopt hoistable platform controller 15 automatically to control.
Aerofoil profile is surveyed the concrete structure of wind element 7 and is seen Fig. 3 and Fig. 4, Fig. 3 is that aerofoil profile is surveyed wind element 7 structural representations, Fig. 4 aerofoil profile is surveyed wind element 7A-A to profile, aerofoil profile is surveyed wind element 7 luvisdes total head gaging hole 24, there is static pressure observing and controlling 23 side, the aerofoil profile adopting is in the present embodiment surveyed wind element 7 and has been arranged three total head gaging holes 24 and six static openings 23, stainless total head joint 22 is connected on total head gaging hole 24, static pressure inlet 21 is connected on static pressure inlet 21, it is correct in order to ensure measuring position that aerofoil profile is surveyed wind element 7, guide vane is respectively being installed up and down, be respectively guide vane 27 and lower guide vane 28, aerofoil profile is surveyed wind element 7 and is arranged on support bar 26, survey wind element 7 and can the less rotation of free resistance adopt upper bearing (metal) 25 and lower bearing 20 in order to ensure aerofoil profile, can adopt general rolling bearing, be fixed on platform for aerofoil profile being surveyed to wind element 7, geometrical clamp 19 and support bar base 29 are adopted, geometrical clamp 19 has adopted general confinement folder, be clamped on hoistable platform 1 railing, base 29 adopts magnet base to be adsorbed on pavement 3, in order better to confine and to prevent from occurring coming off in test process, deflection, further tightly plug with molten metal with iron wire again.
With regard to the preparation debugging work of intelligent vent wind speed measuring system, the data processing of workflow and software aspect describes below, visible Fig. 7 of testing process of system.
Preparation before official testing mainly comprises that two work are respectively stickup and the equipment installation of cursor 5, and the burner nozzle 6 at every layer of every angle all will be pasted cursor 5, has 72 burner nozzles 6 in the present embodiment, next step installation of carrying out each angle blade type survey wind element 7 and cursor sensor 4 is fixed, put distributed data acquisition plate 11 in hoistable platform 1 center, the integrated micro-pressure sensor 12 of multichannel and data collecting instrument 13, and then the upper pressure tube of connection and signal cable etc., computer 14 and hoistable platform controller 15 are placed on outside stove, to carry out the observation of data and the manual intervention of hoistable platform 1, after the connection work of all installations and cable completes, carry out hoistable platform 1 hand-operated lifting test and prevent hoistable platform 1 jam, then on terminal computer 14, carry out the establishment of pilot project, creating pilot project is exactly the definition to vent wind speed surveying work, then data acquisition board and measuring point are configured, in the present embodiment, have the burner nozzle 6 of 18 layers, action frequency under auto state in hoistable platform controller 15 is set as to 18, start and stop interval is set as 30 seconds, in computer 14, be AA layer by first cursor 5 signal definitions, second cursor 5 is defined as A layer, 18 cursors 5 of grade in an imperial examination are defined as SOFA4 layer, just having determined of each spout, if AA layer #1 angle spout is AA-1, AA layer #2 angle spout is AA-2, AA layer #3 angle spout is AA-3, AA layer #4 angle spout is AA-4, defining after spout, the frequency acquisition of data is set as to 1 second, corresponding computing formula and the unit etc. that also wants wind speed setting, after these configurations complete, be set as current record, system just can record measurement data automatically like this, in automatic record data process, there is a judgement to data, survey the calibration result of wind element and the scope of actual vent wind speed according to a line, the criterion of data in judging is that a wind snout (is A layer in the present embodiment, B layer, C layer, D layer, E layer and F layer) wind speed is 0-28m/s, overfire air port wind speed is 0-35m/s, SOFA vent wind speed is 0-45m/s, corresponding measuring point A-1/2/3/4, B-1/2/3/4, C-1/2/3/4, D-1/2/3/4, E-1/2/3/4, the wind speed range of F-1/2/3/4 is 0-28m/s. in test process, all data can be seen in real time and can store, after each working condition measuring completes, can calculate as requested the wind speed deviation of every layer, and can make a variety of changes as requested trend curve, also can calculate as required the ratio of momentum of wind and Secondary Air, calculate the Reynolds number of ventilation etc. also design Excel and loaded grand software kit, experimental data can have been called in to Excel worksheet and carry out further data processing.
Carry out the normal transmission of data-signal and the test of software, and the definite value of hoistable platform controller 15 is set, setting data frequency acquisition on computers, with the definition of data name, all normal after, can notify operations staff to start blower fan and carry out the test of vent wind speed.
First manually boot hoistable platform 1 by hoistable platform controller 15, then transfer hoistable platform controller 15 to automated manner, in the present embodiment, it is 18 that Acquisition Instrument is provided to action number, test interval is set as 30 seconds, that is to say, in the time that hoistable platform controller 15 transfers automated manner to, platform is up motion automatically, in the time that the optical sensor at each angle is received first photoreceptor signal, cursor sensor 4 reaches signal distributed data acquisition plate 11 and then delivers to data collecting instrument 13, 13 of data collecting instruments send stop signal to hoistable platform controller 15, and keep 30 seconds, this signal is also delivered to computer 14 by Acquisition Instrument simultaneously, the differential pressure signal that measured this time by aerofoil profile survey wind element 7 is sent to the integrated micro-pressure sensor of multichannel, deliver to again distributed data acquisition plate 11, and then deliver to data collecting instrument 13, delivering to computer 14 by data collecting instrument 13 processes, computer 14 also starts record data and is AA layer data by data definition, in computer 14, show as AA layer #1 angle wind speed, AA layer #2 angle wind speed, AA layer #3 angle wind speed and AA layer #4 angle wind speed, in computer 14, frequency acquisition is set, frequency acquisition is set as 1 second in this example, that is to say that each spout can collect 30 data, after the measurement of AA layer completes, hoistable platform 1 automatically starts and rises, in the time that Acquisition Instrument is received second cursor 5 signal, start A layer spout data record and record 30 seconds, in the time that Acquisition Instrument is received the 18 cursor 5 signal, starting SOFA4 layer data records and records 30 seconds, when completing after record, first working condition measurement completes, computer 14 stops record data, hoistable platform controller 15 transfers control mode to manual mode and in halted state. then tester manually drops to bottom by hoistable platform, waits for that operations staff adjusts operating mode, just carries out the test of second operating mode after second Operating condition adjustment completes, and then carries out the test of the 3rd operating mode, until whole test job completes.
Claims (10)
1. the vent wind speed measuring system that is applicable to coal burner cold conditions test, is characterized in that, comprise vent wind speed measurement mechanism,Data acquisition and data handling system and mobile platform system, the aerofoil profile of described vent wind speed measurement mechanism is surveyed wind element and will be measuredSignal is delivered to the integrated micro-pressure transmitter of multichannel of data acquisition and data handling system by tube connector, described multichannel is integrated micro-Signal is reached distributed data acquisition plate by pressure transmitter, and the cursor sensor in described mobile platform system is also by the signal recordingBe sent to distributed data acquisition plate, the unification of distributed data acquisition plate is delivered to data collecting instrument by data and is transmitted after to data processingFurther process to computer, computer also can send instruction to the hoistable platform controller of mobile platform system.
2. the vent wind speed measuring system that is applicable to the test of coal burner cold conditions as claimed in claim 1, is characterized in that instituteState vent wind speed measurement mechanism and comprise aerofoil profile survey wind element, the directed wing, support bar and tube connector, the described directed wing is fixed on aerofoil profileSurvey on wind element, the directed wing and aerofoil profile are surveyed wind element and are arranged on support bar as one, and described tube connector is used for connecting aerofoil profile and surveysThe integrated micro-pressure transmitter of wind element and multichannel.
3. the vent wind speed measuring system that is applicable to the test of coal burner cold conditions as claimed in claim 1, is characterized in that instituteState data acquisition and data handling system and comprise the integrated micro-pressure transmitter of multichannel, data collecting instrument and computer, multichannel is integratedMicro-pressure transmitter is surveyed aerofoil profile wind element and records differential pressure signal and be converted to the analog signals of 4-20mA, and data collecting instrument is by 4-20mAAnalog signals be converted to digital quantity signal and deliver to computer and carry out data processing.
4. the vent wind speed measuring system that is applicable to the test of coal burner cold conditions as claimed in claim 2, is characterized in that instituteStating support bar adopts for ensureing that the rolling bearing that aerofoil profile survey wind element freely rotates is connected with aerofoil profile survey wind element.
5. the vent wind speed measuring system that is applicable to the test of coal burner cold conditions as claimed in claim 1 or 2, is characterized in that,Described tube connector comprises total head joint and the total head pressure tube corresponding with total head joint; Static pressure inlet and corresponding static pressure pressure transmissionPipe.
6. the vent wind speed measuring system that is applicable to the test of coal burner cold conditions as claimed in claim 1, is characterized in that instituteState mobile platform system and comprise hoistable platform, suspension system and lifting platform control system, the centre of described hoistable platform and surroundingTake the pavement that is useful on installation, dismounting instrument and equipment, between the framework of described hoistable platform and furnace wall, leave gap and be provided with anti-There is the directive wheel of jam in framework only between lifting process medium dip and furnace wall, and described suspension system comprises suspension gear and elevatorMachine, lifting platform control system is for controlling the lifting of hoistable platform.
7. the vent wind speed measuring system that is applicable to the test of coal burner cold conditions as claimed in claim 6, is characterized in that instituteState lifting platform control system and comprise cursor, cursor sensor and hoistable platform controller, described cursor sticks on burner nozzle,Described hoistable platform controller is a PLC controller, accepts cursor sensor and passes the signal of coming, the finger sending according to computerThe lifting of hoistable platform is controlled in order.
8. the vent wind speed measuring system that is applicable to the test of coal burner cold conditions as claimed in claim 7, is characterized in that instituteState aerofoil profile survey wind element and cursor sensor and be all fixed on the angle of hoistable platform, be fixed on the angle of hoistable platform simultaneouslyOn cursor sensor and aerofoil profile to survey the horizontal center line of wind element consistent.
9. the vent wind speed measuring system that is applicable to the test of coal burner cold conditions as claimed in claim 1, is characterized in that instituteThe luvisde of stating aerofoil profile survey wind element is provided with total head gaging hole, and side is provided with static opening, and total head joint is connected on total head gaging hole,Static pressure inlet is connected on static opening, and the upper and lower that aerofoil profile is surveyed wind element is respectively provided with guide vane, be respectively guide vane and underGuide vane, aerofoil profile is surveyed wind element and is arranged on support bar, and the support bar base that aerofoil profile is surveyed wind element is provided with geometrical clamp, support barBase is adsorbed on pavement.
10. the measuring method of the vent wind speed measuring system that is applicable to the test of coal burner cold conditions as claimed in claim 1, itsFeature is to comprise the following steps:
Step 1: system initialization;
Step 2: manually boot hoistable platform by hoistable platform controller, then transfer hoistable platform controller to automated manner,Hoistable platform is up motion automatically, when the cursor sensor at the each angle of hoistable platform is received first photoreceptor signal, and cursor sensorSignal is reached to distributed data acquisition plate and then delivers to data collecting instrument, and data collecting instrument sends to hoistable platform controllerStop signal, and keep setup times value;
Step 2: when data collecting instrument sends stop signal to hoistable platform controller, signal is also delivered to meter by data collecting instrumentCalculation machine, the differential pressure signal that aerofoil profile survey wind element is measured is sent to the integrated micro-pressure sensor of multichannel, then delivers to distributed data acquisitionPlate, and then deliver to data collecting instrument, to deliver to computer by data collecting instrument and process, computer also starts record data;
Step 3: each spout can collect the data of setting, after computer measurement completes, hoistable platform starts rising automatically,
Step 4: when data collecting instrument is received second cursor signal, start spout data record and record corresponding time, oneUntil data collecting instrument is while receiving the cursor signal of setting, then carries out data record and records the corresponding time, when completing after record,First working condition measurement completes, and computer stops record data, and hoistable platform controller transfers control mode to manual mode alsoIn halted state;
Step 5: adjust operating mode, just carry out the test of second operating mode after second Operating condition adjustment completes, then carry out the 3rdThe test of individual operating mode, until whole test job completes.
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| CN104808013B (en) * | 2015-01-26 | 2017-10-24 | 国家电网公司 | It is applicable the intelligent cold conditions stove internally-powered situation measuring system and method for large-sized boiler |
| CN106124158A (en) * | 2016-08-04 | 2016-11-16 | 河北省电力建设调整试验所 | A kind of boiler cold-state aerodynamic field self-operated measuring unit |
| CN110568214A (en) * | 2019-09-16 | 2019-12-13 | 国网河北省电力有限公司电力科学研究院 | Unmanned automatic collection device for wind speed of boiler cold state dynamic field |
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