CN205538771U - Monitoring system of power plant boiler water cold wall pipe heat -transfer character - Google Patents
Monitoring system of power plant boiler water cold wall pipe heat -transfer character Download PDFInfo
- Publication number
- CN205538771U CN205538771U CN201620001245.0U CN201620001245U CN205538771U CN 205538771 U CN205538771 U CN 205538771U CN 201620001245 U CN201620001245 U CN 201620001245U CN 205538771 U CN205538771 U CN 205538771U
- Authority
- CN
- China
- Prior art keywords
- heat
- water
- temperature
- transfer character
- blind hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 79
- 238000012546 transfer Methods 0.000 title claims abstract description 59
- 238000012544 monitoring process Methods 0.000 title claims abstract description 29
- 238000012806 monitoring device Methods 0.000 claims abstract description 30
- 238000002485 combustion reaction Methods 0.000 claims abstract description 10
- 238000005259 measurement Methods 0.000 claims description 11
- 238000003466 welding Methods 0.000 claims description 6
- 238000000465 moulding Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 25
- 238000009529 body temperature measurement Methods 0.000 abstract description 5
- 239000007769 metal material Substances 0.000 abstract description 2
- 206010034719 Personality change Diseases 0.000 abstract 1
- 238000013480 data collection Methods 0.000 abstract 1
- 238000009434 installation Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 5
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000013021 overheating Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Landscapes
- Measuring Temperature Or Quantity Of Heat (AREA)
Abstract
The utility model relates to a monitoring system of power plant boiler water cold wall pipe heat -transfer character for the temperature of the different positions of each water -cooling wall of monitoring boiler, include heat -transfer character monitoring devices group, data collection station, data display unit and furnace combustion control computer in boiler water wall different positions installation, every water cold wall pipe heat -transfer character monitoring devices, including at least three temperature measurement component, the specific position that the temperature measurement component set up respectively on the device is used for measuring the side of waring oneself in front of a fire, back of the body fire side and the working medium temperature of being surveyed water cold wall pipe by the survey. Through the monitoring devices who arranges in boiler different positions, can be in real time to the monitoring of boiler water wall pipe heat -transfer character, including water cold wall pipe side wall temperature, the back of the body the working medium temperature among wall temperature and the water cold wall pipe of inclining of angering of waring oneself in front of a fire, be convenient for master kiln flame to water -cooling wall heat transfer performance's change, the change of working medium self heat -transfer character and water -cooling wall metal material temperature distribution character's change etc..
Description
Technical field
The present invention relates to coal-fired power generator set field, particularly relate to monitoring system and the monitoring method of a kind of Water Wall Tube in Station Boiler heat-transfer character.
Background technology
Boiler water-wall tube is the visual plant of station boiler, the feedwater of boiler enters in the water-cooling wall of boiler by water-cooling wall bottom header, feedwater accepts the heat from furnace flame in boiler tube from the bottom to top, it is gradually converted into steam water interface or steam, enters steam turbine workmanship after continuing heating subsequently into other heating surfaces and produce electric energy.The biography characteristic of cold wall pipe directly affects feeding water to be had by the flame heating vaporescence in burner hearth in boiler tube, during being changed into steam by water heating in boiler tube, the physical parameter of working-medium water such as density, heat conductivity, specific heat capacity, viscosity coefficients etc. all there occurs violent change, in addition the fluctuation of current plant boiler ature of coal is big, universal peaking operation is frequent, in stove, Combustion System is complicated and changeable, in addition the hydrodynamic design of boiler self may not be perfect etc. factor, the most easily cause the heat transfer deterioration of water-cooling wall, water-cooling wall metal overheating problem occurs, water-cooling wall also can be caused time serious tired, drawing crack or overheating failure, cause Waterwall tube failure, the safe operation of harm boiler.
The detection method of the current heat-transfer character to water-cooling wall, mainly by the back of the body fire face of the water-cooling wall outside stove, heat-collecting block and temperature-measuring element are installed, measuring the temperature of water screen tube, indirectly reflection furnace flame is to the heat transfer of water-cooling wall and the water-cooling wall heat absorption situation to working medium.The shortcoming of the method is that the heat transfer between furnace flame and water-cooling wall is lacked limited monitoring, can not directly measure the true temperature to fire side pipe wall, and the Temperature of Working in water screen tube is lacked measurement result, the physical property state of working-medium water cannot be known, it is difficult to grasp and the thermal conduction study characteristic of soda pop side in analyzer tube, the heat transfer deterioration situation of soda pop side cannot be monitored and take the effective precautionary measures, burning and hydrodynamic control parameter cannot be adjusted according to the real-time heat transfer situation of water-cooling wall targetedly, improve the safety of boiler operatiopn.
Summary of the invention
The technical problem to be solved in the present invention is to provide monitoring method and the system of a kind of Water Wall Tube in Station Boiler heat-transfer character, it can be to the comprehensive monitoring of water-cooling wall heat-transfer character, including to fire side temperature and changes of heat flux situation, the state of the heat-transfer character such as the outside temperature difference in the working medium physical parameter of soda pop side and water screen tube, contributes to finding in time and solve owing to Combustion System is the best, boiler circuit design or the problems such as water-cooling wall overtemperature that reason causes such as not enough and variable parameter operation control method is the most proper present in running.
In order to solve the problems referred to above, the present invention provides the monitoring system of a kind of Water Wall Tube in Station Boiler heat-transfer character, it is positioned at the temperature of the water screen tube of boiler water wall diverse location for monitoring, is included in Combustion System computer in heat-transfer character monitoring device group, data acquisition unit, data display equipment and the stove that boiler water wall diverse location is installed；Temperature data is sent to described data acquisition unit by data line by described heat-transfer character monitoring device group, and described temperature data is sent to Combustion System computer in described data display equipment and described stove by described data acquisition unit；Described heat-transfer character monitoring device group includes some water screen tube heat-transfer character monitoring devices, it is correspondingly arranged in some tested water screen tubes, described each water screen tube heat-transfer character monitoring device includes at least three temperature-measuring element and at least three blind hole, described tested water screen tube inside fire side, back-fire side and working medium, be respectively provided with blind hole, described temperature-measuring element is placed in corresponding blind hole.
In preferred version, described heat-transfer character monitoring device group comprises several and is arranged in the water screen tube heat-transfer character monitoring device that boiler is both horizontally and vertically gone up.
In preferred version, described water screen tube heat-transfer character monitoring device includes three-way piece, plug-in type end socket, heat-collecting block, three temperature-measuring elements and three blind holes, and described temperature-measuring element is respectively back-fire side temperature-measuring element, to fire side temperature-measuring element and Temperature of Working measuring cell；Wherein, before and after three-way piece, two ends connect with tested water screen tube respectively；Described three-way piece back-fire side offers the first blind hole, and the direction of described first blind hole is towards described three-way piece to fire side, and the described measurement end to fire side temperature-measuring element is arranged in the first blind hole；Described plug-in type end socket is arranged on the exit, top of three-way piece, and the center of plug-in type end socket offers the second blind hole, and the measurement end of described Temperature of Working measuring cell is arranged in the second blind hole；Described heat-collecting block is arranged on the back-fire side of three-way piece, and heat-collecting block offers the 3rd blind hole, and the measurement end of described back-fire side temperature-measuring element is arranged in the 3rd blind hole.
In preferred version, the first blind hole deviates one, the water screen tube axis safe distance of described three-way piece, and described safe distance is the imaginary radius of tested water screen tube.Water screen tube imaginary radius is calculated by the Stress Check of three-way piece tube wall.
In preferred version, the left and right sides of described three-way piece is all with the fin of integrated molding, and the water screen tube that fin is adjacent with the three-way piece left and right sides respectively welds.
In preferred version, described plug-in type end socket is equipped with groove with the exit, top of three-way piece, and the top of plug-in type end socket and three-way piece forms threeway top end socket weld seam by welding.
In preferred version, before and after described three-way piece, the junction of two ends and boiler water-wall tube is all offered and is equipped with before and after groove, and three-way piece two ends and boiler water-wall tube junction and all forms threeway two ends attachment weld by welding.
In preferred version, the central shaft of the 3rd blind hole that described heat-collecting block is offered is parallel to the centrage of described boiler water-wall tube, and the end of measuring of described back-fire side temperature-measuring element is fixed in the 3rd blind hole by the fastening bolt being perpendicular to the 3rd blind hole central shaft.
In preferred version, one end that described plug-in type end socket stretches in described three-way piece is set to tip.
The invention have the benefit that breaching tradition water-cooling wall wall temperature detecting system is only capable of measuring the limitation of water screen tube back-fire side temperature, by the monitoring device arranged at boiler diverse location, it is capable of on industry station boiler, monitoring to boiler water-wall tube heat-transfer character in real time, including water screen tube to fire sidewall temperature, Temperature of Working in back-fire side wall temperature and water screen tube, it is easy to grasp the furnace flame change to water-cooling wall heat transfer property, the change of working medium self heat-transfer character and the change etc. of water-cooling wall metal material temperature distributing characteristic, for monitoring burning, heat transfer deterioration that the factors such as hydrodynamic force and variable working condition state modulator strategy cause or water-cooling wall overtemperature etc., raising boiler operatiopn safety and economy are provided reliable monitoring result and adjusts foundation；The present invention is applicable not only to self-burn circulating steam generator system, it is also applied for the monitoring of super (super-) critical steam generator system water-cooling wall heat-transfer character, may be used for burning and the boiler circuit method of operation in stove are adjusted and are optimized, reduce boiler circuit temperature deviation in stove, prevent water-cooling wall overtemperature, improve safety and the service life of water-cooling wall.
Accompanying drawing explanation
Fig. 1 is the front view of the monitoring device of Water Wall Tube in Station Boiler heat-transfer character of the present invention；
Fig. 2 is the side view of the monitoring device of Water Wall Tube in Station Boiler heat-transfer character of the present invention；
Fig. 3 is the monitoring system structure schematic diagram of Water Wall Tube in Station Boiler heat-transfer character of the present invention.
Description of reference numerals
1, three-way piece；2, adjacent water screen tube；3, to fire side temperature-measuring element；4, fin；5, threeway top end socket weld seam；6, plug-in type end socket；7, Temperature of Working measuring cell；8, tested water screen tube；9, threeway two ends attachment weld；10, fastening bolt；11, heat-collecting block；12, back-fire side temperature-measuring element；13, water screen tube imaginary radius；14, monitoring device group；15, boiler；16, data line；17, data acquisition unit；18, data display equipment；19, Combustion System computer in stove.
Detailed description of the invention
In order to make the purpose of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.
See Fig. 1,2,3, the present invention relates to the monitoring system of a kind of Water Wall Tube in Station Boiler heat-transfer character, it is included in the boiler 15 water screen tube heat-transfer character monitoring device group 14 that boiler water wall diverse location is respectively mounted, data line 16, data acquisition unit 17, Combustion System computer 19 in data display equipment 18 and stove；Wherein, each water screen tube heat-transfer character monitoring device, see Fig. 1 and Fig. 2, including boiler water wall to fire sidewall temperature measurement element 3, three-way piece 1, plug-in type end socket 6, Temperature of Working measuring cell 7, heat-collecting block 11 and back-fire side temperature-measuring element 12.
Water screen tube heat-transfer character monitoring device three-way piece 1 is the main element of single monitoring device, it is connected with boiler water-wall tube 8 respectively before and after three-way piece 1, and two ends and boiler water-wall tube 8 junction are all offered and be equipped with groove before and after three-way piece 1, before and after three-way piece 1, two ends and boiler water-wall tube 8 junction all form threeway two ends attachment weld 9 by welding；The left and right sides of three-way piece 1 is all with the fin 4 of integrated molding, and the fin 4 of three-way piece 1 left and right sides welds with the adjacent water screen tube 2 of both sides respectively.
Described three-way piece 1 back-fire side offers the first blind hole, and the direction of described first blind hole is arranged in the first blind hole to the measurement end of fire sidewall temperature measurement element 3 towards described three-way piece 1 to fire side, boiler water wall；Plug-in type end socket 6 all offers groove with the exit, top of three-way piece 1, and form threeway top end socket weld seam 5 by welding, and the center of plug-in type end socket 6 offers the second blind hole, the measurement end of Temperature of Working measuring cell 7 is arranged in the second blind hole, for measuring the Temperature of Working in three-way piece 1；Heat-collecting block 11 is arranged on the back-fire side of three-way piece 1, the 3rd blind hole is offered on heat-collecting block 11, the measurement end of back-fire side temperature-measuring element 12 is arranged in the 3rd blind hole, wherein, the central shaft of the 3rd blind hole offered on heat-collecting block 11 is parallel to boiler water-wall tube 8, and the end of measuring of back-fire side temperature-measuring element 12 is fastened in the 3rd blind hole by the fastening bolt 10 being perpendicular to the 3rd blind hole central shaft.
Additionally, the water screen tube imaginary radius 13 of the first blind hole deviation three-way piece 1, wherein, water screen tube imaginary radius 13 is to be calculated by the Stress Check of three-way piece 1 tube wall, the pressure-bearing safety of pipe fitting when needing to ensure properly functioning.
The material of plug-in type end socket 6 is consistent with the material of boiler water-wall tube 8, and its length inserting the interior part of three-way piece 1 and inside/outside diameter size need through ess-strain calculation and check, ensure safety, and need through thermal conduction study calculation and check, it is ensured that this measuring point can accurately measure intraductal working medium temperature levels；Additionally, one end that plug-in type end socket 6 stretches in three-way piece 1 is set to tip.
The present invention measures to fire side temperature by install on three-way piece 1 simultaneously to fire sidewall temperature measurement element 3, and soda pop Temperature of Working in boiler water-wall tube 8 measured by Temperature of Working measuring cell 7, and back-fire side temperature-measuring element 12 measures back-fire side tube wall temperature.These three temperature is to affect the key parameter of water-cooling wall heat-transfer character, and direct reaction furnace flame, to the heat release of water-cooling wall, heat transfer between the heat absorption of working medium and working medium and boiler tube, thus achieves the real-time measurement to water screen tube heat-transfer character.
In addition, three temperature results that single monitoring device can be measured by the present invention in real time, send into the real-time monitoring system of boiler operatiopn, the single monitoring device group of multiple monitoring devices composition just can monitor burning and the hydrodynamic force ruuning situation of whole boiler, serve not only as running operator and carry out the reference frame of combustion adjustment, it is also possible to realize automatically adjusting by industrial control computer.
It is above the better embodiment of the present invention, but protection scope of the present invention is not limited to this.Any those of ordinary skill in the art in the technical scope that disclosed herein, the conversion expected without creative work or replacement, all should contain within protection scope of the present invention.Therefore protection scope of the present invention should be as the criterion with the protection domain that claim is limited.
Claims (9)
1. the monitoring system of a Water Wall Tube in Station Boiler heat-transfer character, the temperature of the water screen tube of boiler water wall diverse location it is positioned at for monitoring, it is characterised in that: it is included in Combustion System computer in heat-transfer character monitoring device group, data acquisition unit, data display equipment and the stove that boiler water wall diverse location is installed；Temperature data is sent to described data acquisition unit by data line by described heat-transfer character monitoring device group, and described temperature data is sent to Combustion System computer in described data display equipment and described stove by described data acquisition unit；Described heat-transfer character monitoring device group includes some water screen tube heat-transfer character monitoring devices, it is correspondingly arranged in some tested water screen tubes, described each water screen tube heat-transfer character monitoring device includes at least three temperature-measuring element and at least three blind hole, described tested water screen tube inside fire side, back-fire side and working medium, be respectively provided with blind hole, described temperature-measuring element is placed in corresponding blind hole.
2. the monitoring system of Water Wall Tube in Station Boiler heat-transfer character as claimed in claim 1, it is characterised in that: described heat-transfer character monitoring device group comprises several and is arranged in the water screen tube heat-transfer character monitoring device that boiler is both horizontally and vertically gone up.
3. the monitoring system of Water Wall Tube in Station Boiler heat-transfer character as claimed in claim 2, it is characterized in that: described water screen tube heat-transfer character monitoring device includes three-way piece, plug-in type end socket, heat-collecting block, three temperature-measuring elements and three blind holes, described temperature-measuring element is respectively back-fire side temperature-measuring element, to fire side temperature-measuring element and Temperature of Working measuring cell；Wherein, before and after three-way piece, two ends connect with tested water screen tube respectively；Described three-way piece back-fire side offers the first blind hole, and the direction of described first blind hole is towards described three-way piece to fire side, and the described measurement end to fire side temperature-measuring element is arranged in the first blind hole；Described plug-in type end socket is arranged on the exit, top of three-way piece, and the center of plug-in type end socket offers the second blind hole, and the measurement end of described Temperature of Working measuring cell is arranged in the second blind hole；Described heat-collecting block is arranged on the back-fire side of three-way piece, and heat-collecting block offers the 3rd blind hole, and the measurement end of described back-fire side temperature-measuring element is arranged in the 3rd blind hole.
4. the monitoring system of Water Wall Tube in Station Boiler heat-transfer character as claimed in claim 3, it is characterised in that: described first blind hole deviates one, the water screen tube axis safe distance of described three-way piece, and described safe distance is the imaginary radius of tested water screen tube.
5. the monitoring system of Water Wall Tube in Station Boiler heat-transfer character as claimed in claim 3, it is characterised in that: the left and right sides of described three-way piece is all with the fin of integrated molding, and the water screen tube that described fin is adjacent with the three-way piece left and right sides respectively welds.
6. the monitoring system of Water Wall Tube in Station Boiler heat-transfer character as claimed in claim 3, it is characterized in that: described plug-in type end socket is equipped with groove with the exit, top of three-way piece, and the top of plug-in type end socket and three-way piece forms threeway top end socket weld seam by welding.
7. the monitoring system of Water Wall Tube in Station Boiler heat-transfer character as claimed in claim 3, it is characterized in that: before and after described three-way piece, the junction of two ends and boiler water-wall tube is all offered and is equipped with before and after groove, and three-way piece two ends and boiler water-wall tube junction and all forms threeway two ends attachment weld by welding.
8. the monitoring system of Water Wall Tube in Station Boiler heat-transfer character as claimed in claim 3, it is characterized in that: the central shaft of the 3rd blind hole offered on described heat-collecting block is parallel to described boiler water-wall tube centrage, the end of measuring of described back-fire side temperature-measuring element is fixed in the 3rd blind hole by the fastening bolt being perpendicular to the 3rd blind hole central shaft.
9. the monitoring system of the Water Wall Tube in Station Boiler heat-transfer character as described in any one of claim 3 to 8, it is characterised in that: one end that described plug-in type end socket stretches in described three-way piece is set to tip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620001245.0U CN205538771U (en) | 2016-01-04 | 2016-01-04 | Monitoring system of power plant boiler water cold wall pipe heat -transfer character |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620001245.0U CN205538771U (en) | 2016-01-04 | 2016-01-04 | Monitoring system of power plant boiler water cold wall pipe heat -transfer character |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205538771U true CN205538771U (en) | 2016-08-31 |
Family
ID=56764198
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620001245.0U Expired - Fee Related CN205538771U (en) | 2016-01-04 | 2016-01-04 | Monitoring system of power plant boiler water cold wall pipe heat -transfer character |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205538771U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424746A (en) * | 2016-01-04 | 2016-03-23 | 华能南京金陵发电有限公司 | Monitoring system and method for heat transfer characteristic of water wall tube of utility boiler |
| US11668535B2 (en) | 2017-11-10 | 2023-06-06 | Ecolab Usa Inc. | Cooling water monitoring and control system |
| US11891309B2 (en) | 2017-09-19 | 2024-02-06 | Ecolab Usa Inc. | Cooling water monitoring and control system |
-
2016
- 2016-01-04 CN CN201620001245.0U patent/CN205538771U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105424746A (en) * | 2016-01-04 | 2016-03-23 | 华能南京金陵发电有限公司 | Monitoring system and method for heat transfer characteristic of water wall tube of utility boiler |
| US11891309B2 (en) | 2017-09-19 | 2024-02-06 | Ecolab Usa Inc. | Cooling water monitoring and control system |
| US11668535B2 (en) | 2017-11-10 | 2023-06-06 | Ecolab Usa Inc. | Cooling water monitoring and control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205538771U (en) | Monitoring system of power plant boiler water cold wall pipe heat -transfer character | |
| CN203940411U (en) | A kind of arrangement of convection superheater | |
| CN202902251U (en) | Water-cooled wall fire-facing surface metal temperature measuring device for boiler | |
| CN205481826U (en) | Heat conduction oil furnace control system | |
| CN103216812A (en) | Method for on-line monitoring and alarming of convection heating face flue gas temperature field of power station boiler | |
| CN105424746A (en) | Monitoring system and method for heat transfer characteristic of water wall tube of utility boiler | |
| CN216160037U (en) | On-line measuring device for temperature of boiler water-cooling wall of thermal generator set | |
| CN2916602Y (en) | External wall temperature measuring point structure for boiler super-heater/reheater with reduced measuring error | |
| CN108105749B (en) | Working medium flow On-line Measuring Method and system in a kind of water screen tube | |
| CN104235823A (en) | Novel method for online monitoring flue gas heat load distribution of spiral water wall of supercritical boiler | |
| CN112627772A (en) | Gas-electricity dual-purpose heat pipe heater for oil field well mouth and method | |
| CN112066353A (en) | Device and method for monitoring wall temperature of heat exchange tube in furnace by adopting compressed air cooling protection | |
| CN201575876U (en) | Novel external-cooling type heat flow meter | |
| JP3239203U (en) | Fire side wall temperature measurement device for boiler water wall | |
| CN105466645A (en) | System and method for quickly detecting air leakage factor of boiler tail flue | |
| CN102808743A (en) | Temperature control method and system for cabin of wind turbine generator | |
| CN203024868U (en) | Spectral online temperature measuring instrument with visual function | |
| CN204962705U (en) | Special reflector of explosion -proof inspection of boiler abrasionproof | |
| CN104061563A (en) | Water-cooled wall metal temperature online-measurement method and device for (ultra)-supercritical boiler | |
| CN211085487U (en) | Wall temperature deviation detection device for water wall | |
| CN202630018U (en) | Power station boiler | |
| CN220187876U (en) | Power station boiler membrane water wall temperature measuring device | |
| CN205015089U (en) | Experimental device for simulation coal -fired power plant boiler thermal current density detect | |
| CN201992621U (en) | Fixing device for heating surface inside supercritical tower type boiler | |
| CN201653594U (en) | Novel double-wing heat flow meter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160831 |