CN102506410A - Monitoring device for running state of circulating fluidized bed boiler in power station - Google Patents
Monitoring device for running state of circulating fluidized bed boiler in power station Download PDFInfo
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- CN102506410A CN102506410A CN2011103613899A CN201110361389A CN102506410A CN 102506410 A CN102506410 A CN 102506410A CN 2011103613899 A CN2011103613899 A CN 2011103613899A CN 201110361389 A CN201110361389 A CN 201110361389A CN 102506410 A CN102506410 A CN 102506410A
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Abstract
A monitoring device for the running state of a circulating fluidized bed boiler in a power station comprises a differential pressure sensor for a hearth, a differential pressure sensor for a return chamber of a return valve, a differential pressure sensor for a loose chamber of the return valve, a data acquisition module and a computer. Pressure sensing ports of the differential pressure sensor for the hearth, the differential pressure sensor for the return chamber of the return valve and the differential pressure sensor for the loose chamber of the return valve are communicated with inner cavities of inner pipes of a funnel cap of the hearth on an air distributing plate of the hearth, a funnel cap of the return chamber of the return valve on an air distributing plate of the return valve and a funnel cap of the loose chamber of the return valve on the air distributing plate of the return valve respectively through pressure measuring pipes, signal output ends of the differential pressure sensors are connected with different input channels of the data acquisition module respectively, and the data acquisition module is connected with the computer through a communication interface. Pressure monitoring points are arranged in the inlet pipes of the funnel cap, the pressure measuring pipes cannot be blocked or abraded, and reliability of the monitoring device and accuracy of monitoring results are greatly improved.
Description
Technical field
The present invention relates to a kind ofly be used to monitor Gas-solid Two-phase Flow state in the recirculating fluidized bed,, belong to the detection technique field so that in time find the boiler furnace slagging scorification, reveal the device of fault.
Background technology
Recirculating fluidized bed (CFB) burning is the clean coal combustion technology of a maturation, is widely used at station boiler.In recent years, the capacity and the parameter of CFBB improve fast, and supercritical circulating fluidized bed boiler becomes the important development direction that CFBB maximizes.Yet the fault rate height is one of distinct issues the most in the CFB station boiler unit operation.CFB unit annual utilization hours number is less than 2/3 of conventional pulverized-coal boiler unit; Cause the economy of its operation not reach designing requirement as yet; Wherein boiler furnace slagging scorification, leakage fault are to cause the major reason of unit non-programmed halt, and the Gas-solid Two-phase Flow situation has direct relation in the generation of these faults and the stove.Therefore adopt Gas-solid Two-phase Flow state in the monitored in various ways recirculating fluidized bed, in time find and handle its abnormal work state, significant for the safety and economic operation of CFBB.
CFB bed layer pressure fluctuation has comprised the comprehensive multidate information in the fluid bed, is the external dynamic reflection of the multiple factor interactions such as physical dimension, operating condition of particle characteristics, bubble characteristic, bed.Can characterize the Gas-solid Two-phase Flow state in the fluid bed through measuring CFB furnace pressure fluctuation signal and extraction and analysis relevant feature parameters.Both at home and abroad CFB bed layer pressure wave characteristic is discovered at present yet sum up; A common characteristic is: although the signal analysis treating method that each researcher takes possibly be not quite similar; But bed presses the monitoring point to be arranged in the above Gas-solid Two-phase Flow zone of the interior air distribution plate of stove and/or on the burner hearth wall; Exist bed to press checkout gear by the problem of frequent jams, heavy wear; Reduced the reliability of monitoring device, and the traditional monitoring device can't monitor in the stove gas-solid flow regime of diverse location on the horizontal direction, influence the accuracy of monitoring result.
Summary of the invention
The objective of the invention is to overcome prior art deficiency, a kind of reliable, monitoring result power station CFBB monitoring running state device accurately is provided.
Problem according to the invention realizes with following technical proposals:
A kind of power station CFBB monitoring running state device; It is made up of the loosening chamber of burner hearth differential pressure pick-up, material returning valve material return chamber differential pressure pick-up, material returning valve differential pressure pick-up, data acquisition module and computer, and the pressure-sensitive mouth of the loosening chamber of said burner hearth differential pressure pick-up, material returning valve material return chamber differential pressure pick-up and material returning valve differential pressure pick-up is surveyed the inlet tube inner chamber that burner hearth blast cap on pipe and the burner hearth air distribution plate, material returning valve material return chamber blast cap and the material returning valve on the material returning valve air distribution plate on the material returning valve air distribution plate become flexible the chamber blast cap through pressure respectively and is communicated with; Their signal output part connects the different input channels of data acquisition module respectively; Said data acquisition module is connected with computer through communication interface.
Above-mentioned power station CFBB monitoring running state device; Said burner hearth differential pressure pick-up is provided with a plurality of; Corresponding two the burner hearth blast caps of each burner hearth differential pressure pickup are below each burner hearth feedback outlet, slag-drip opening, coal feeding hole and lime stone inlet and burner hearth center, center, territory, burner hearth right half-court, center, territory, burner hearth left half-court is provided with surveys the burner hearth blast cap that pipe is connected with the burner hearth differential pressure pick-up through pressure.
Above-mentioned power station CFBB monitoring running state device; Said material returning valve material return chamber differential pressure pick-up is provided with a plurality of; Corresponding two the material returning valve material return chamber blast caps of each material returning valve material return chamber differential pressure pick-up; In the material return chamber zone near burner hearth on the material returning valve air distribution plate, survey the material returning valve material return chamber blast cap that pipe is connected with material returning valve material return chamber differential pressure pick-up through pressure and arrange along the feed back direction with feed back direction vertical direction.
Above-mentioned power station CFBB monitoring running state device; The loosening chamber of said material returning valve differential pressure pick-up is provided with a plurality of; The loosening chamber of corresponding two material returning valves of differential pressure pick-up, the loosening chamber of each material returning valve blast cap; On the material returning valve air distribution plate with loosening chamber region that the feed back standpipe is connected in, survey the loosening chamber of the material returning valve blast cap that pipe is connected with the loosening chamber of material returning valve differential pressure pick-up through pressure and arrange along the feed back direction with feed back direction vertical direction.
Above-mentioned power station CFBB monitoring running state device, the sampling end that said pressure is surveyed pipe is fixed on the outer wall of corresponding blast cap inlet tube, and is communicated with the inlet tube inner chamber of blast cap through the pore on the blast cap inlet tube wall.
The present invention is arranged in pressure monitoring point in the inlet tube of the loosening chamber of burner hearth blast cap, material returning valve material return chamber blast cap and material returning valve blast cap; Owing to having only air-flow not have Dual-Phrase Distribution of Gas olid in each blast cap inlet tube; Thereby the blocked or wearing and tearing of pressure survey Guan Buhui, so just improved the reliability of monitoring device greatly.Simultaneously, the monitoring point of this device can be arranged in any position on the horizontal direction in the stove as required, has improved the accuracy of monitoring result.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further specified.
Fig. 1 is structural representation of the present invention (is example with the pressure sensor);
Fig. 2 is the layout sketch map of burner hearth blast cap pressure-measuring-point on the burner hearth air distribution plate;
Fig. 3 is material return chamber's areal pressure measuring point and the layout sketch map of loosening chamber region pressure-measuring-point on the material returning valve air distribution plate.
Each label is among the figure: 1, burner hearth air distribution plate; 2, burner hearth; 3, burner hearth blast cap; 4, material returning valve material return chamber blast cap; 5, the loosening chamber of material returning valve blast cap; 6, feed back standpipe; 7, material returning valve; 8, the loosening chamber of material returning valve differential pressure pick-up; 9, pressure is surveyed pipe; 10, data acquisition module; 11, computer; 12, material returning valve air distribution plate; 13, material returning valve material return chamber differential pressure pick-up; 14, burner hearth differential pressure pick-up; A～P, burner hearth blast cap pressure-measuring-point; A～g, material return chamber's areal pressure measuring point; H～l, loosening chamber region pressure-measuring-point.
The specific embodiment
The present invention utilizes the modern signal processing method to extract the characteristic parameter of burner hearth, material returning valve diverse location blast cap Pressure Fluctuation Signal; Thereby judge in burner hearth and the material returning valve Gas-solid Two-phase Flow state of diverse location on the horizontal direction, interior coking, leakage, the fluidisation of prediction burner hearth and material returning valve freely do not reach the generation of fault such as blast cap obstruction.Concrete grammar is to arrange burner hearth blast cap pressure-measuring-point (each with pressure survey to manage the 9 blast cap inlet tubes that are connected be a pressure-measuring-point) on the inlet tube wall of the burner hearth blast cap 3 in the water cooled wind chamber below CFB burner hearth 2; Arrange material return chamber's blast cap pressure-measuring-point on the inlet tube wall of the material return chamber's blast cap 4 below material returning valve 7 material return chamber in the bellows; With loosening chamber that feed back standpipe 6 is connected below arrange loosening chamber blast cap pressure-measuring-point on the inlet tube wall of loosening chamber blast cap 5 in the bellows; All blast cap pressure-measuring-points are surveyed pipe through pressure and are connected with the joint of respective differences pressure sensor; Convert the pressure differential pressure that records to the signal of telecommunication through differential pressure pick-up; Again the signal of telecommunication is delivered to the AD conversion that data acquisition module 10 carries out signal, be stored at last in the computer 11.Through above-mentioned in the power station CFB boiler furnace blast cap and material returning valve material return chamber, loosening chamber blast cap inlet arrange pressure-measuring-point; Utilize modern pressure measurement technology and signal processing method; Extract the related pressure characteristic parameter of Gas-solid Two-phase Flow state in reflection burner hearth, the material returning valve; Relationship model in build-up pressure characteristic parameter and the burner hearth between different operational factors, gas/solid two phase flow pattern, material returning valve feed back situation, operating condition and the typical fault etc. is judged the running status in the stove and is predicted the generation of stove internal fault.
Pressure measxurement mode of the present invention is the metering system that single measuring point, two measuring point combine; Single measuring point pressure signal characteristic parameter can reflect the Gas-solid Two-phase Flow situation of part and whole system around the blast cap of measuring point place, can also reflect the influence of supply air system structure and service condition; Two measuring point differential pressure signal characteristic parameters then can reflect the Gas-solid Two-phase Flow situation in zone between two measuring point place blast caps.The inlet tube wall of burner hearth air distribution plate and material returning valve air distribution plate diverse location blast cap is selected in the pressure measxurement position; The variation of the operational factor in varying level zone, Dual-Phrase Distribution of Gas olid type, operating condition etc. in variation reflection burner hearth through diverse location blast cap pressure, differential pressure signal characteristic parameter, the material returning valve; Thereby the local fluidization situation and the whole fluidization uniformity of reflection burner hearth, material returning valve, the generation of local typical fault in prediction burner hearth, the material returning valve.Signal processing method adopts wavelet analysis, Wigner analysis of spectrum to realize the localization time frequency analysis of pressure, differential pressure signal; Obtain different frequency section pressure, differential pressure signal trend and the difference frequency domain distribution of pressure, differential pressure fluctuation amplitudes constantly over time; In conjunction with the time domain standard deviation; Assess pressure, the differential pressure fluctuation amplitude of different frequency section, analyze the frequecy characteristic of the gas-solid fluidized bed Pressure Fluctuation Signal of non-stationary in conjunction with local peak weighted average frequency
frequently; Utilize AR model spectra estimation method that different pressures, differential pressure signal are carried out power Spectral Estimation; The energy frequency domain of picked up signal distributes; The globality of assessing pressure, differential pressure fluctuation frequency in conjunction with energy weighted average frequency
changes; According to different appearance, position and the sizes at peak frequently in the power spectrum chart, judge the Dual-Phrase Distribution of Gas olid type in the zone of surveying.Related definition is following:
In the formula
;
is respectively local dominant frequency and corresponding amplitude size constantly; Molecule is corresponding to the frequency weighting sum of part moment dominant frequency amplitude energy; Carry out amplitude normalization with amplitude energy sum as denominator, irrelevant with the time domain intensity of assurance
and Pressure Fluctuation Signal.
In the formula
;
is respectively local frequencies and the corresponding amplitude of local frequencies in the frequency domain; Molecule is corresponding to the frequency weighting sum of local frequencies amplitude energy; With amplitude energy sum as denominator carrying out amplitude normalization, to guarantee
and the frequency domain intensity of Pressure Fluctuation Signal has nothing to do.
This monitoring system is according to the Gas-solid Two-phase Flow state of diverse location in the different blast cap measuring point pressure oscillation characteristic parameter monitoring CFB stoves, and its principle is that Gas-solid Two-phase Flow can produce pressure oscillation and pressure propagation in the fluid bed: the pressure oscillation during bubbling fluidization is mainly caused by generation, the motion of bubble on the air distribution plate, the institute that merges, breaks; The turbulence effect of gas has aggravated the fragmentation of bubble during the turbulence fluidization, has limited the coalescence of bubble, makes the pressure oscillation frequency increase, and macroscopical pressure oscillation amplitude reduces; Gas grain speed is very fast during fast fluidization; The part particle is assembled agglomerating under gas-particle, particle-intergranular interaction; Move in Two-Phase Flow Field as a whole fluid mass, what pressure oscillation mainly reflected is the kinetic wave phenomenon of cluster of grains.And single measuring point pressure oscillation can reflect that the pressure wave that other regional Gas-solid Two-phase Flow produces in pressure oscillation that measuring point regional area Gas-solid Two-phase Flow produces and the system fluctuates through the measuring point regional area additonal pressure of propagating, decay brings; Two measuring point differential pressure fluctuation then can reflect between two measuring points the pressure oscillation that Gas-solid Two-phase Flow produced along measuring point line direction.
Fig. 1 is a structural representation of the present invention.In Fig. 1, the model of data acquisition module 10 is: USB7360BF, the loosening chamber of material returning valve differential pressure pick-up 8, material returning valve material return chamber differential pressure pick-up 13 and burner hearth differential pressure pick-up 14 have all only drawn one, all should be a plurality of during practical implementation.
The loosening chamber of burner hearth differential pressure pick-up 14 among the present invention, material returning valve material return chamber differential pressure pick-up 13 and material returning valve differential pressure pick-up 8 is also replaceable be corresponding pressure sensor, and surveys through pressure and to manage 9 and be connected with two corresponding blast cap pressure-measuring-points.
With certain 135MW grade CFB boiler is example; Its material circulating system is by single burner hearth, two cyclone separators and the feed back standpipe and the material returning valve of bottom are formed separately; The stokehold is furnished with six coal feeding holes; The bottom, stokehold is reserved with three lime stones inlet, and the lower furnace portion both walls is respectively arranged two slag cooler return air inlets and two burner hearth slag-drip openings, the coarse granule that separates by cyclone separator through material returning valve by burner hearth after the wall emulsion zone that returns burner hearth bottom carry out circulating combustion; The layout sketch map of its burner hearth blast cap pressure-measuring-point on the burner hearth air distribution plate is as shown in Figure 2; On the inlet tube wall of two blast caps, arrange pressure-measuring-point A, B respectively below the wall feedback outlet behind the burner hearth, near the back wall; Below the burner hearth both walls slag-drip opening, arrange pressure-measuring-point C, D, I, J respectively on the inlet tube wall near four blast caps of both walls respectively; Arrange pressure-measuring-point F, G in the burner hearth center; Arrange pressure-measuring-point E in center, territory, burner hearth right half-court, arrange pressure-measuring-point H in center, territory, burner hearth left half-court, arrange pressure-measuring-point K～P respectively on the inlet tube wall below coal feeding hole and lime stone enter the mouth, near six blast caps of burner hearth front wall.
Measuring point F, G pressure signal characteristic parameter can reflect the pressure oscillation variation tendency and the Gas-solid Two-phase Flow situation thereof of burner hearth central area, and measuring point E, H pressure signal characteristic parameter then can reflect the pressure oscillation variation tendency and the Gas-solid Two-phase Flow situation thereof of territory, burner hearth right half-court and center, territory, left half-court respectively.Measuring point A, B pressure signal characteristic parameter can reflect material returning valve in burner hearth the loopback material to the influence of pressure oscillation of burner hearth regional area and Gas-solid Two-phase Flow, thereby reflection feed back situation.Measuring point C, D and I, J pressure signal characteristic parameter can reflect respectively then that burner hearth is right, the left side bed drain purge is to the influence of regional area pressure oscillation of burner hearth both sides and Gas-solid Two-phase Flow, thus the reflection slag-discharging condition.Measuring point K～P pressure signal characteristic parameter can reflect respectively by six coal feeding holes of burner hearth front wall and in stove, adds the influence of fuel quantity to regional area pressure oscillation of burner hearth front wall and Gas-solid Two-phase Flow, thereby reflect different coal feeding hole coal supply situations and whole coal supply situation; Measuring point L, M (or N), O pressure signal characteristic parameter can also reflect by three lime stones of burner hearth front wall inlet and in stove, add the influence of lime stone to regional area pressure oscillation of burner hearth front wall and Gas-solid Two-phase Flow, thus the lime stone state of supply and the whole lime stone state of supply of reflection different lime inlet.In addition, measuring point E, F differential pressure signal characteristic parameter and measuring point H, G differential pressure signal characteristic parameter can reflect that respectively burner hearth central area right part and left part Dual-Phrase Distribution of Gas olid are along the flow performance on the left and right directions; Measuring point A, E differential pressure signal characteristic parameter and measuring point L, E differential pressure signal characteristic parameter can reflect that respectively later half zone of burner hearth and preceding half regional Dual-Phrase Distribution of Gas olid are along the flow performance on the fore-and-aft direction.
It is example that the blast cap measuring point of material returning valve is arranged with the loop seal; The layout sketch map of its blast cap measuring point on the material returning valve air distribution plate is as shown in Figure 3; In material return chamber zone near burner hearth; Arrange pressure-measuring-point b～e on four blast caps inlet tube walls arranging along the feed back direction, arrange pressure-measuring-point a, c, f, g on four blast caps inlet tube walls that edge and feed back direction vertical direction are arranged, wherein measuring point c, d, f blast cap are positioned at the material return chamber center; At the loosening chamber region that is connected with the feed back standpipe; Along arranging pressure-measuring-point h, j on two blast caps inlet tube walls of feed back direction arrangement; Make two measuring points and measuring point b～e connect being aligned, arrange pressure-measuring-point i～l on four blast caps inlet tube walls that edge and feed back direction vertical direction are arranged.
Measuring point a, c, f, g pressure signal characteristic parameter can reflect in the material returning valve material return chamber with feed back direction vertical direction on the pressure oscillation variation tendency and the Gas-solid Two-phase Flow situation thereof of each position, thereby the local fluidization situation and the whole fluidization uniformity of reflection material returning valve material return chamber.Measuring point b～e pressure signal characteristic parameter can reflect in the material returning valve material return chamber pressure oscillation variation tendency of each position and Gas-solid Two-phase Flow situation thereof on the feed back direction, face mutually among measuring point b, c, d, e, the h measuring point differential pressure signal characteristic parameter can reflect in the material returning valve material return chamber and between loosening chamber and the material return chamber Dual-Phrase Distribution of Gas olid along the flow performance on the feed back direction.Measuring point i, j, k, l pressure signal characteristic parameter can reflect that material returning valve becomes flexible the pressure oscillation variation tendency and the Gas-solid Two-phase Flow situation thereof of each position on indoor and the feed back direction vertical direction, thus the local fluidization situation and the whole fluidization uniformity of the loosening chamber of reflection material returning valve.In addition; Measuring point c, a differential pressure signal characteristic parameter and measuring point f, g differential pressure signal characteristic parameter can reflect the flow performance of Dual-Phrase Distribution of Gas olid edge, material return chamber's right part and left part zone and feed back direction vertical direction respectively, and measuring point j, i differential pressure signal characteristic parameter and measuring point k, l differential pressure signal characteristic parameter can reflect the flow performance of loosening chamber right part and the regional Dual-Phrase Distribution of Gas olid of left part edge and feed back direction vertical direction respectively.
Claims (5)
1. power station CFBB monitoring running state device; It is characterized in that; It is made up of with computer (11) the loosening chamber differential pressure pick-up (8) of burner hearth differential pressure pick-up (14), material returning valve material return chamber differential pressure pick-up (13), material returning valve, data acquisition module (10), and the pressure-sensitive mouth of the loosening chamber differential pressure pick-up (8) of said burner hearth differential pressure pick-up (14), material returning valve material return chamber differential pressure pick-up (13) and material returning valve is managed the inlet tube inner chamber that burner hearth blast cap (3) on (9) and the burner hearth air distribution plate (1), material returning valve material return chamber blast cap (4) and the material returning valve on the material returning valve air distribution plate (12) on the material returning valve air distribution plate (12) become flexible chamber blast cap (5) through the pressure survey respectively and is communicated with; Their signal output part connects the different input channels of data acquisition module (10) respectively; Said data acquisition module (10) is connected with computer (11) through communication interface.
2. according to the said power station of claim 1 CFBB monitoring running state device; It is characterized in that; Said burner hearth differential pressure pick-up (14) is provided with a plurality of; The corresponding burner hearth blast cap (3) of each burner hearth differential pressure pick-up (14) is below each burner hearth feedback outlet, slag-drip opening, coal feeding hole and lime stone inlet and burner hearth center, center, territory, burner hearth right half-court, center, territory, burner hearth left half-court is provided with surveys the burner hearth blast cap (3) that pipe is connected with burner hearth differential pressure pick-up (14) through pressure.
3. according to claim 1 or 2 said power station CFBB monitoring running state devices; It is characterized in that; Said material returning valve material return chamber's differential pressure pick-up (13) is provided with a plurality of; The corresponding material returning valve material return chamber blast cap (4) of each material returning valve material return chamber differential pressure pick-up (13); In material returning valve air distribution plate (12) is gone up the material return chamber zone near burner hearth, arrange along the feed back direction with feed back direction vertical direction through the material returning valve material return chamber blast cap (4) that pressure survey pipe (9) is connected with material returning valve material return chamber differential pressure pick-up (13).
4. according to the said power station of claim 3 CFBB monitoring running state device; It is characterized in that; The loosening chamber differential pressure pick-up (8) of said material returning valve is provided with a plurality of; The loosening chamber blast cap (5) of the corresponding material returning valve of the loosening chamber differential pressure pick-up (8) of each material returning valve; In the loosening chamber region that material returning valve air distribution plate (12) is gone up with the feed back standpipe is connected, arrange along the feed back direction with feed back direction vertical direction through the loosening chamber blast cap (5) of material returning valve that pressure survey pipe (9) is connected with the loosening chamber differential pressure pick-up (8) of material returning valve.
5. according to the said power station of claim 4 CFBB monitoring running state device; It is characterized in that; The sampling end that said pressure is surveyed pipe (9) is fixed on the outer wall of corresponding blast cap inlet tube, and is communicated with the inlet tube inner chamber of blast cap through the pore on the blast cap inlet tube wall.
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| CN201110361389.9A CN102506410B (en) | 2011-11-15 | 2011-11-15 | Monitoring device for running state of circulating fluidized bed boiler in power station |
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| CN201110361389.9A CN102506410B (en) | 2011-11-15 | 2011-11-15 | Monitoring device for running state of circulating fluidized bed boiler in power station |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102706509A (en) * | 2012-06-21 | 2012-10-03 | 华北电力大学（保定） | Running state monitoring device for slag cooler of circulating fluidized bed boiler in power station |
| CN103743538A (en) * | 2014-01-09 | 2014-04-23 | 煤炭科学研究总院 | Air distributor test device for fluidized bed |
| CN111624140A (en) * | 2020-05-18 | 2020-09-04 | 武汉理工大学 | Device and method for measuring distribution of pulverized coal leakage flow field |
| CN111964043A (en) * | 2020-09-01 | 2020-11-20 | 福建省圣新环保股份有限公司 | Novel chicken manure boiler return bed and monitoring method thereof |
| CN115289461A (en) * | 2022-08-04 | 2022-11-04 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Resistance uniformity processing structure and method for air distribution plate of circulating fluidized bed boiler |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102706509A (en) * | 2012-06-21 | 2012-10-03 | 华北电力大学（保定） | Running state monitoring device for slag cooler of circulating fluidized bed boiler in power station |
| CN103743538A (en) * | 2014-01-09 | 2014-04-23 | 煤炭科学研究总院 | Air distributor test device for fluidized bed |
| CN103743538B (en) * | 2014-01-09 | 2019-10-18 | 煤炭科学技术研究院有限公司 | A kind of fluidized bed air distribution plate experimental rig |
| CN111624140A (en) * | 2020-05-18 | 2020-09-04 | 武汉理工大学 | Device and method for measuring distribution of pulverized coal leakage flow field |
| CN111624140B (en) * | 2020-05-18 | 2021-08-17 | 武汉理工大学 | Device and method for measuring distribution of pulverized coal leakage flow field |
| CN111964043A (en) * | 2020-09-01 | 2020-11-20 | 福建省圣新环保股份有限公司 | Novel chicken manure boiler return bed and monitoring method thereof |
| CN111964043B (en) * | 2020-09-01 | 2023-04-07 | 福建省圣新环保股份有限公司 | Novel chicken manure boiler return bed and monitoring method thereof |
| CN115289461A (en) * | 2022-08-04 | 2022-11-04 | 内蒙古电力(集团)有限责任公司内蒙古电力科学研究院分公司 | Resistance uniformity processing structure and method for air distribution plate of circulating fluidized bed boiler |
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| CN102506410B (en) | 2014-05-14 |
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