CN107063587B - Power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device and method - Google Patents
Power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device and method Download PDFInfo
- Publication number
- CN107063587B CN107063587B CN201710267607.XA CN201710267607A CN107063587B CN 107063587 B CN107063587 B CN 107063587B CN 201710267607 A CN201710267607 A CN 201710267607A CN 107063587 B CN107063587 B CN 107063587B
- Authority
- CN
- China
- Prior art keywords
- false
- false tube
- tube
- boiler flue
- pressure
- 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.)
- Active
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
- G01M3/28—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds
- G01M3/2807—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes
- G01M3/2815—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors for pipes, cables or tubes; for pipe joints or seals; for valves ; for welds for pipes using pressure measurements
Abstract
The invention discloses a kind of power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundles to reveal anticipation device and method, the anticipation device includes several false tube groups that gas inlet end in boiler flue is arranged in, each false tube group include again it is horizontal in boiler flue perpendicular to the false tube of flue gas direction of travel, false tube setting closed at one end in boiler flue, the false tube end stretched out outside boiler flue is connected by false tube header, and the control valve that fixation pressure medium is full of into false tube header group is provided on false tube header；Be provided with outside boiler flue connect with false tube header be used to monitor the pressure monitoring device of pressure medium and the leakage warning device for alarming when pressure is reduced in false tube header group.The present invention can alarm in advance before coal economizer heat exchanging tube beam wears leakage, and the bundle region that will be revealed is isolated, and causing after preventing tube bank from revealing, which influences the hidden danger that unit generation load is even shut down caused by heat exchange pipe plug ash, occurs.
Description
Technical field
The present invention relates to power plant technical field of heat exchange, especially a kind of low-level (stack-gas) economizer of power plant boiler flue installation
Restrain the anticipation apparatus and method of leakage.
Background technique
Thermal power plant consumes the 50% of coal in China total output, and heat loss due to exhaust gas is in station boiler various heat losses
Maximum one, generally 5~8%, account for the 80% or higher of boiler Total heat loss.The principal element for influencing heat loss due to exhaust gas is pot
Furnace exhaust gas temperature, under normal circumstances, exhaust gas temperature is every to increase 10 DEG C, and heat loss due to exhaust gas increases by 0.5%.China's active service fired power generating unit
Middle exhaust gas temperature generally maintains 125~150 DEG C of left and right horizontals, and high fume temperature is a universal phenomenon.In addition, smoke evacuation
Temperature increases, Electric Scrubber Efficiency decline；So that blower, deduster working environment deteriorate, shorten service life of equipment；For wet
Method desulphurization system, exhaust gas temperature is excessively high will to expend a large amount of desuperheating water, and desulfuration efficiency reduces, and flue gas water content increases, chimney fortune
Row is degrading.
In order to rationally utilize boiler exhaust gas heat, boiler exhaust gas loss is reduced, generation current factory is generally pacified in back-end ductwork
Low-level (stack-gas) economizer is filled, recycling boiler exhaust gas loss achievees the purpose that energy saving, reduction energy consumption, reduction disposal of pollutants.Due to saving
Coal device is installed in flue, and certain density flue dust is contained in flue gas, is especially mounted to the economizer of deduster front end, flue dust
Concentration is higher, can cause more serious abrasion to the heat exchanger tube of economizer.
The leakage of judgement tube bank at present is generally visual, that is, flue there are flowing out；Or changed by smoke temperature, water temperature, it needs
Want experienced operator on duty that could judge;Or the installation leakage alarm detection device in flue, principle are tube bank leakage water
Outflow changes the humidity or electrical conductivity of flue gas, instrument judgement alarm.But these leakage alarms are all that heat-exchanging tube bundle is really revealed
After water outflow, triggering alarm or water are flowed out from flue, belong to subsequent judgement, and the stifled ash loss of bring tube bank is inevitable.
After heat-exchanging tube bundle wear and leakage, when revealing smaller, steam and flue dust are flowed along flue gas direction, not noticeable；
After leakage increases, water is flowed out along flue, and heat-exchanging tube bundle heating surface at this moment can generally be caused seriously to block up ash, and smoke flow channels subtract
Small, resistance increases, and blower power output increases, and influences generating set load.For Properties of CFB, in furnace plus lime stone is de-
Sulphur, after economizer tube bank is revealed, cigarette ash, which meets water, can condense into the hard scale of similar cement block, and processing is more time-consuming, laborious, separately
Outer heat-exchanging tube bundle is the finned tube for reinforcing heat exchange, and fin clearance blocks up full dust stratification substantially, can not thoroughly restore, seriously affect heat exchange
Efficiency, some are even scrapped.
After tube bank leakage, generally takes switching that corresponding header group is isolated, sees that outward leakage water size judges leak site,
Time is long, and worker operation amount is big, the bad judgement having, have to overall isolation, effect should be had by losing economizer, due to tuze bundle resistance force
Presence, also bring increase fan energy consumption, serious influence generation load is even shut down.
Summary of the invention
The technical problem to be solved by the invention is to provide a kind of power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundles to let out
The pipe that will be revealed is isolated to alarm in advance before the abrasion leakage of coal economizer heat exchanging tube beam in the anticipation device and method in advance of dew
Beam region, causing after preventing tube bank from revealing, which influences the hidden danger that unit generation load is even shut down caused by heat exchange pipe plug ash, occurs.
In order to solve the above technical problems, the technical solution used in the present invention is as follows.
Power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device, including setting are located in boiler flue
Several false tube groups at every set heat-exchanging tube bundle gas inlet end, each false tube group include at least again two it is horizontal in boiler flue hang down
Directly in the false tube of flue gas direction of travel, the false tube outside boiler flue is stretched out in false tube setting closed at one end in boiler flue
End is connected by false tube header, is provided on the false tube header into false tube header and false tube and is full of fixation pressure medium
Control valve；Be provided with outside the boiler flue connect with false tube header be used to monitor pressure medium in false tube header and false tube
Pressure monitoring device and leakage warning device for alarming when pressure is reduced, the signal of the pressure monitoring device
The input terminal of end connection leakage warning device.
Above-mentioned power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle, which is revealed, prejudges device, in the false tube header and false tube
Medium be inert gas.
Above-mentioned power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device, the false tube are and heat-exchanging tube bundle
The seamless steel pipe of equal wall thickness or thinned wall thickness.
Above-mentioned power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device, the pressure monitoring device include
One pressure gauge and a distance-transmission pressure gauge on the spot, input terminal of the distance-transmission pressure gauge through controlling alarm connection leakage alarming device.
A kind of power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage pre-judging method, specifically includes the following steps:
A. it is respectively provided with one group of false tube positioned at every set heat-exchanging tube bundle gas inlet end in boiler flue, false tube is horizontal in pot
It is vertical with flue gas direction of travel in furnace flue；
B., the false tube header of connection false tube outer end is set on the outside of boiler flue, the false tube end envelope in boiler flue
Setting is closed, false tube header group is formed；
C. the inert gas of rated pressure is injected in the false tube header group formed to false tube header and false tube；
D. the pressure change of inert gas in false tube header group is monitored, and real-time Transmission is to leakage warning device；
E. judge whether the pressure of inert gas in false tube header group is less than rated pressure, when indifferent gas in false tube header group
When the pressure of body is less than rated pressure, alarm is issued.
Above-mentioned power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle reveals pre-judging method, further includes step F, and alarm occurs
Afterwards, pressure check is carried out by the pressure gauge on the spot being arranged at false tube header, determines the false tube header group leaked, Jin Erguan
The heat-exchanging tube bundle header Inlet and outlet water valve for closing its rear can be overhauled.
Due to using above technical scheme, the invention technological progress is as follows.
The present invention is worn using low-level (stack-gas) economizer heat exchanger tube is initially mainly manifested in two rows before flue gas windward side
Characteristic on pipe, the one or two row is designed as the abrasionproof false tube of not water-filling work on heat exchanger flue gas windward side, then in false tube
And injection has inert gas in the false tube header outside heat-exchanging tube bundle, can grind first before coal economizer heat exchanging tube beam is worn
Abrasionproof false tube is damaged, the heat-exchanging tube bundle that will be worn and progress are then realized come before by the pressure decline of inert gas in advance
The bundle region that will be revealed is isolated in alarm, and the heat-exchanging tube bundle after protecting prevents heat-exchanging tube bundle from abrasion leakage occurs, thus
It avoids the hidden danger that heat-exchanging tube bundle leakage causes influence unit generation load caused by heat exchange pipe plug ash even to shut down to occur, subtract
Maintenance fund after having lacked heat-exchanging tube bundle abrasion leakage, extends the service life of low-level (stack-gas) economizer, improves equipment operation
Security reliability and economy.
Detailed description of the invention
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is scheme of installation of the false tube of the present invention in flue.
Wherein: 1. boiler flues, 2. false tubes, 3. false tube headers, 4. pressure gauges on the spot, 5. controlling alarm routes, 6. leakages
Warning device, 7. distance-transmission pressure gauges, 8. control valves, 9. heat-exchanging tube bundles, 10. boiler flues, 11. heat-exchanging tube bundle headers.
Specific embodiment
Below in conjunction with the drawings and specific embodiments, the present invention will be described in further detail.
A kind of power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device, structure is as shown in Figure 1, include
Several false tube groups in boiler flue 10 are set, and each false tube group is located at the gas inlet end of a set of heat-exchanging tube bundle 9.
Each false tube group includes at least two horizontal false tubes 2 in boiler flue, and false tube 2 is perpendicular to flue gas direction of travel
Setting stretches out 2 end of false tube outside boiler flue as shown in Fig. 2, being located at the setting closed at one end of false tube 2 in boiler flue 10
It is connected by false tube header 3, forms a false tube header group；In the present embodiment, false tube is and the wall thickness such as heat-exchanging tube bundle or is thinned
The seamless steel pipe of wall thickness.Control valve 8 is provided on false tube header, the false tube header group for being formed into false tube header and false tube
Interior injection fixation pressure medium.In the present invention, being full of the medium in false tube header and false tube is inert gas, such as nitrogen
Deng, can guarantee safety in production on the basis of, avoid environmental pollution.
Pressure monitoring device and leakage warning device 6, the signal end connection of pressure monitoring device are provided with outside boiler flue
The input terminal of leakage warning device.Pressure monitoring device is connect with false tube header, is situated between for monitoring in false tube header and false tube
Matter pressure changing, and it is transferred to leakage warning device；Leakage warning device is used to alarm when pressure is reduced, and reminds
Heat-exchanging tube bundle leakage will occur for operating personnel, repair processing to it in advance.In the present invention, pressure monitoring device includes one
Pressure gauge 4 and a distance-transmission pressure gauge 7 on the spot, distance-transmission pressure gauge 7 connect the input of leakage alarming device 6 through controlling alarm route 5
End；Wherein, pressure gauge is used for the convenient working personnel in leakage alarming device alarm to arrive live accurate judgement specifically which group on the spot
False tube header group breaks down, to repair to its corresponding heat-exchanging tube bundle；Distance-transmission pressure gauge is used for by reporting to leakage
Alarm device sends remote pressure signal, carries out the judgement of pressure change for leakage alarming device and triggers warning device accordingly, into
One step leakage alarming device can also by the pressure value of distance-transmission pressure gauge real-time monitoring distally control centre DCS system carry out
Transmission.
A kind of power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage pre-judging method, specifically includes following steps.
A. it is respectively provided with one group of false tube positioned at every set heat-exchanging tube bundle gas inlet end in boiler flue, false tube is horizontal in pot
It is vertical with flue gas direction of travel in furnace flue.
B., the false tube header of connection false tube outer end is set on the outside of boiler flue, the false tube end envelope in boiler flue
Setting is closed, false tube header group is formed.
C. the inert gas of rated pressure is injected in the false tube header group formed to false tube header and false tube.
D. the pressure change of inert gas in false tube header group is monitored, and real-time Transmission is to leakage warning device.
E. judge whether the pressure of inert gas in false tube header group is less than rated pressure, when indifferent gas in false tube header group
When the pressure of body is less than rated pressure, alarm is issued.
F. in actual motion, the false tube of general windward side front end is first worn, false tube header decompression after leakage, accordingly
It reveals reporting device and issues alarm, power plant's operation control picture of control centre also accordingly issues alarm.Operating personnel receives the report for police service
Afterwards, scene is rushed for, pressure check is carried out by the pressure gauge on the spot being arranged at false tube header, determines the false tube header leaked
Group, and then the Inlet and outlet water valve of the heat-exchanging tube bundle header 11 at its rear is closed, it can be overhauled.
The present invention first wears the mechanism of windward side front end false tube according to power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle,
False tube, grouping composition false tube header group are installed in coal economizer heat exchanging tube beam front end, each header group fills the lazy of certain pressure
Property gas, pressure reduction is alarmed after the abrasion of front-seat false tube, is achieved the purpose that give warning in advance, is avoided low-level (stack-gas) economizer heat-exchanging tube bundle
Cause to restrain stifled ash there is a situation where leakage, blocking flue, influence unit load, is tieed up after abrasion leakage is greatly reduced
Shield fund extends low-level (stack-gas) economizer service life, improves equipment property safe and reliable to operation and economy.
Claims (5)
1. power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device, it is characterised in that: including being arranged in boiler
It is located at several false tube groups at every set heat-exchanging tube bundle (9) gas inlet end in flue (10), each false tube group includes at least two again
Horizontal (2) one end seal of false tube in boiler flue perpendicular to the false tube (2) of flue gas direction of travel, in boiler flue (10)
Close setting, stretch out false tube (2) end outside boiler flue by false tube header (3) connection, be provided on the false tube header to
The control valve (8) of fixation pressure medium is full of in false tube header and false tube；It is provided with outside the boiler flue and connects with false tube header
Connect for monitoring in false tube header and false tube the pressure monitoring device of pressure medium and for being reported when pressure is reduced
Alert leakage warning device (6), the input terminal of signal end connection leakage warning device (6) of the pressure monitoring device；It is described
Pressure monitoring device includes pressure gauge (4) and a distance-transmission pressure gauge (7) on the spot, and distance-transmission pressure gauge (7) is through controlling alarm route
(5) connect leakage alarming device input terminal, leakage alarming device can also by the pressure value of distance-transmission pressure gauge real-time monitoring to
The DCS system of distant place control centre is transmitted.
2. power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device according to claim 1, feature
Be: the medium in the false tube header and false tube is inert gas.
3. power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device according to claim 1, feature
Be: the false tube is the seamless steel pipe with the wall thickness such as heat-exchanging tube bundle or thinned wall thickness.
4. a kind of power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage as described in any one of claims 1 to 3 item
Pre-judging method, which is characterized in that specifically includes the following steps:
A. it is respectively provided with one group of false tube positioned at every set heat-exchanging tube bundle gas inlet end in boiler flue, false tube is horizontal in boiler smoke
It is vertical with flue gas direction of travel in road；
B., the false tube header of connection false tube outer end is set on the outside of boiler flue, and the false tube end-enclosed in boiler flue is set
It sets, forms false tube header group；
C. the inert gas of rated pressure is injected in the false tube header group formed to false tube header and false tube；
D. the pressure change of inert gas in false tube header group is monitored, and real-time Transmission is to leakage warning device；
E. judge whether the pressure of inert gas in false tube header group is less than rated pressure, when inert gas in false tube header group
When pressure is less than rated pressure, alarm is issued.
5. power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle according to claim 4 reveals pre-judging method, feature
It is, further includes step F, after alarm occurs, pressure check is carried out by the pressure gauge on the spot being arranged at false tube header, determines hair
The false tube header group of raw leakage, and then the heat-exchanging tube bundle header Inlet and outlet water valve for closing its rear can be overhauled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710267607.XA CN107063587B (en) | 2017-04-21 | 2017-04-21 | Power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710267607.XA CN107063587B (en) | 2017-04-21 | 2017-04-21 | Power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device and method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107063587A CN107063587A (en) | 2017-08-18 |
| CN107063587B true CN107063587B (en) | 2018-12-25 |
Family
ID=59603432
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710267607.XA Active CN107063587B (en) | 2017-04-21 | 2017-04-21 | Power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device and method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107063587B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108020386A (en) * | 2018-01-24 | 2018-05-11 | 青岛达能环保设备股份有限公司 | The pre- leak detection system of large-scale low-temperature economizer |
| CN113063551B (en) * | 2021-04-14 | 2023-08-15 | 建投邢台热电有限责任公司 | Device and method for judging number of leakage tube bundles of heat pipe type low-temperature economizer |
| CN113915605A (en) * | 2021-11-17 | 2022-01-11 | 包头钢铁（集团）有限责任公司 | Online maintenance method for auxiliary coke dry quenching economizer |
| CN114484290A (en) * | 2022-02-14 | 2022-05-13 | 山东汉华工业设备有限公司 | Leakage detection method for heat exchange equipment |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202002079U (en) * | 2011-03-03 | 2011-10-05 | 上海阿波罗机械股份有限公司 | Heat transmission tube for recycling afterheat of boiler smoke |
| CN102401590A (en) * | 2011-11-21 | 2012-04-04 | 昆明理工大学 | Power generation system for waste heat of medium and low temperature flue gas with heat pipe heat exchanger organic medium Rankine cycle |
| CN204008014U (en) * | 2014-07-12 | 2014-12-10 | 中国石油化工股份有限公司 | Condenser copper tube leak detector |
| CN206656146U (en) * | 2017-04-21 | 2017-11-21 | 河北冀研能源科学技术研究院有限公司 | Power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device |
-
2017
- 2017-04-21 CN CN201710267607.XA patent/CN107063587B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202002079U (en) * | 2011-03-03 | 2011-10-05 | 上海阿波罗机械股份有限公司 | Heat transmission tube for recycling afterheat of boiler smoke |
| CN102401590A (en) * | 2011-11-21 | 2012-04-04 | 昆明理工大学 | Power generation system for waste heat of medium and low temperature flue gas with heat pipe heat exchanger organic medium Rankine cycle |
| CN204008014U (en) * | 2014-07-12 | 2014-12-10 | 中国石油化工股份有限公司 | Condenser copper tube leak detector |
| CN206656146U (en) * | 2017-04-21 | 2017-11-21 | 河北冀研能源科学技术研究院有限公司 | Power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107063587A (en) | 2017-08-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107063587B (en) | Power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device and method | |
| CN101706110A (en) | Near-wall air device for preventing high-temperature corrosion of water-cooled wall of power station boiler | |
| CN206656146U (en) | Power plant boiler flue low-level (stack-gas) economizer heat-exchanging tube bundle leakage anticipation device | |
| CN101476716B (en) | Slag residual heat utilization apparatus for industrial boiler | |
| CN102128439B (en) | Assembly type heat-pipe steam generator of kiln furnace | |
| CN103105243A (en) | Thermocouple temperature measuring device capable of monitoring temperature of boiler | |
| CN103542420B (en) | A kind of coal-burning boiler contains heat-exchanger rig and the method for SO3 flue gas | |
| CN214791245U (en) | Anti-blocking type pipe box type air preheater | |
| CN202994319U (en) | Boiler thermocouple temperature measuring device | |
| CN203869074U (en) | Device for recovering waste heat of gas boiler | |
| CN102721037A (en) | Boiler flue gas waste heat recovery system and control method thereof | |
| CN201344546Y (en) | Slag discharge and waste heat utilization equipment for industrial boiler | |
| CN201028570Y (en) | Multilevel rotating energy conservation dust removing and harmful gas removing vertical boiler | |
| CN208831877U (en) | A kind of steam turbine of thermal power plant boiler circuit drain valve is interior to leak monitoring device | |
| CN105650658B (en) | A kind of low-level (stack-gas) economizer on-bne repair device and method | |
| CN214581146U (en) | Wall box device for monitoring inner leakage of steam soot blower | |
| CN212673175U (en) | Boiler soot blowing drainage-free system | |
| CN218480598U (en) | Anti-abrasion device and system for boiler tube bank | |
| CN215336457U (en) | Boiler slope type water-cooled wall grid film type abrasion-proof and smashing-proof device | |
| CN114109533B (en) | Efficient gas turbine rotor air cooler and leakage-proof control method | |
| CN216976537U (en) | Visual automatic displacement alarm system for low-pressure thermal power pipeline compensator | |
| CN217004496U (en) | Device for preventing dust from accumulating at bottom of low-temperature economizer | |
| CN210891593U (en) | Positive pressure horizontal water pipe waste heat boiler | |
| CN212451478U (en) | Drainage system for accumulated water in blast furnace hearth | |
| CN215675283U (en) | Subcritical boiler multi-target collaborative optimization air preheater anti-blocking system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 050000 2nd floor, Yingpan commercial and residential building, 129 Nanxiao street, Qiaoxi District, Shijiazhuang City, Hebei Province Patentee after: Hebei Jiantou energy science and Technology Research Institute Co.,Ltd. Address before: 050000 2nd floor, Yingpan commercial and residential building, 129 Nanxiao street, Qiaoxi District, Shijiazhuang City, Hebei Province Patentee before: HEBEI JI-YAN ENERGY SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |