CN106705019A - Wide-load efficient water supply regenerative system - Google Patents
Wide-load efficient water supply regenerative system Download PDFInfo
- Publication number
- CN106705019A CN106705019A CN201611120272.0A CN201611120272A CN106705019A CN 106705019 A CN106705019 A CN 106705019A CN 201611120272 A CN201611120272 A CN 201611120272A CN 106705019 A CN106705019 A CN 106705019A
- Authority
- CN
- China
- Prior art keywords
- heater
- final stage
- water supply
- steam
- regenerative system
- 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.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/32—Feed-water heaters, i.e. economisers or like preheaters arranged to be heated by steam, e.g. bled from turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses a wide-load efficient water supply regenerative system. The wide-load efficient water supply regenerative system comprises a plurality of stages of heaters which are sequentially connected in series along a water supply pipe; the tops of two relatively-low-stage heaters are connected with a turbine high pressure cylinder, and the tops of the other heaters are connected with a turbine middle pressure cylinder; and the wide-load efficient water supply regenerative system is characterized in that a tail-stage water supply heater is further included; the tail-stage water supply heater is arranged on the next stage of the lowest-stage heater on the water supply pipe, the top of the tail-stage water supply heater is connected with the turbine high pressure cylinder through a steam pipe behind a compensation valve, and the bottom of the tail-stage water supply heater is connected with the lowest-stage heater through a first dewatering pipe or connected with a sub-lowest heater through a second dewatering pipe. The wide-load efficient water supply regenerative system is an effective measure for maintaining or improving the water supply temperature under the unit low-load state, the environmental protection property, the economical efficiency and the safety of a unit are accordingly improved, and the wide-load regenerative system is formed.
Description
Technical field
The present invention relates to a kind of water supply heat back system that can be used for load condition wide, for Turbo-generator Set.
Background technology
The natural endowment of China's primary energy is the few oil lean gas of many coals, and rich coal resources, energy residue can adopt gross reserves Central Plains
Coal accounts for 58.8%, and coal accounts for China's total output of primary energy 75%, accounts for total quantity consumed 70%, determines China based on coal
Using energy source general layout is by long-term existence.Energy supply sustainable growth based on coal electricity, is also the economic fast and stable development of China
There is competitiveness in the world, keep rational development cost to provide necessary condition, be China's energy resources natural endowment and work
The inevitable outcome of industryization development.
" 13 " planning draft proposes to build modern energy system, by " Coal Clean is efficiently utilized, complete to coal unit
Implement minimum discharge and reducing energy consumption in face " it is classified as one of big key project of energy field eight.Proposed in draft, implement coal electricity energy-conservation
Emission reduction and upgrading action plan, minimum discharge and reducing energy consumption are implemented in full to coal unit.With air environmental pollution
Problem is outstanding day by day, and people are also more and more high for the requirement of environmental protection.Point out that China will be big in national energy-saving emission reduction planning
Push into power industry desulphurization denitration.Domestic some regulations require that unit needs to meet load denitration operation wide.Many places
Policy Conditions, the electricity power enterprise not up to standard to the emission reduction of NOx is reduced subsidy, is cancelled subsidy even fine.Therefore, this patent
The load denitration technology wide of proposition is necessary.
Coal fired thermal power plant is again pollutant emission monitoring rich and influential family, the flue gas desulfurization of thermal power plant, denitration oneself turn into China's " energy-conservation
One important process of emission reduction ".For denitration technology, current SCR methods (selective catalytic reduction) be in the world using at most,
A kind of most ripe gas denitrifying technology of technology.But use SCR method denitrations, when unit be in underload (60% rated load with
Under) operation when, the operating temperature that the reactor inlet temperature of SCR denitration system drops below catalyst is interval, and SCR takes off
Nitre system is out of service.The present situation of peak regulation is participated according to the current Large-scale fire-electricity unit of China, unit needs in low negative at any time
Lotus running status.Thus under existence conditions, denitrating system utilization rate is not high, and therefore unit Environmental Protection Level also gives a discount.
Existing water supply heat back system is as shown in figure 1, the multiple stage heater including being sequentially connected in series along feedwater piping 12, figure
It is that 6, No. two heaters 7 of three, i.e., No. one heater and No. three heaters 8 (press the priority to current direction boiler of heater in 1
Order is numbered), with steam turbine high-pressure cylinder 1 at the top of two rudimentary heaters (i.e. No. one heater 6 and No. two heaters 7)
Connection, senior heater (i.e. No. three heaters 8) top is connected with Steam Turbine Through IP Admission 9, Steam Turbine Through IP Admission 9, vapour
Turbine high pressure cylinder 1 is connected in series along the steam flow direction of main steam line 9, and the end of main steam line 9 is final stage jet chimney
10；The bottom of each heater is connected with the heater of its upper level, the bottom of five-star heater (i.e. No. three heaters 8)
It is connected with final hydrophobic outlet 15.When unit is in underload, extraction pressure reduction, correspondence feed temperature reduction causes pot
The average endothermic temperature reduction of stove, so as to reduce the thermodynamic cycle thermal efficiency of unit, reduces unit economy, equal generated energy
Under, the pollutant discharge amount corresponding to the low unit of efficiency wants relative increase.Thus how feedwater is improved in unit underload
Temperature, this is the key issue for realizing load denitration wide at present.
The content of the invention
To be solved by this invention is that denitrating system needs the problem of stoppage in transit under unit is in running on the lower load, while improving
The underload economy of unit.
In order to solve the above problems, the invention provides a kind of load high-efficiency feedwater heat regenerative system wide, including along feed pipe
The multiple stage heater that road is sequentially connected in series, two heaters top of lower level is connected with steam turbine high-pressure cylinder, other heating
Device top be connected with Steam Turbine Through IP Admission, Steam Turbine Through IP Admission, steam turbine high-pressure cylinder along main steam line steam flow direction
It is connected in series, main steam line end is final stage jet chimney, the bottom of each heater is connected with the heater of its upper level,
The bottom of five-star heater is connected with final hydrophobic outlet, it is characterised in that also including final stage feed-water heater, the end
Located at the next stage of the heater of lowermost level on feedwater piping, final stage feed-water heater top passes through filling valve to level feed-water heater
Jet chimney is connected with steam turbine high-pressure cylinder afterwards, and final stage feed-water heater bottom connects the heating of lowermost level by drain water piping one
Device connects secondary rudimentary heater by drain water piping two.
Preferably, jet chimney is provided with steam control valve, check (non-return) valve after the filling valve.Steam control valve is arranged on and increases
If the final stage jet chimney on, for being adjusted to the steam in the final stage jet chimney, the steam can be kept
Pressure after regulating valve is basically unchanged in varying duty, and maintains to be given described in the boiler by the final stage feed-water heater
The temperature of water meets the requirement that puts into operation of denitrating system.
Preferably, jet chimney is connected with steam turbine high-pressure cylinder, final stage jet chimney respectively after the filling valve, and final stage is steamed
Steam pipe road is provided with filling valve, by filling valve do not did also a part of steam of work(by final stage jet chimney into final stage to
Water heater, to the feedwater of further heating boiler.
Preferably, it is connected in series with three-level heater on the feedwater piping.
Preferably, the feedwater piping two ends are connected in parallel to system bypass.
Preferably, the final stage feed-water heater also connects condenser by emergent drain pipeline, on emergent drain pipeline
It is provided with emergency drain valve.
The efficient heat regenerative system of load wide proposed by the present invention, can reach two targets.One is by by this engineering steam turbine
High parameter vapour source introduce heater, improve unit running on the lower load feed temperature, make feed temperature close to optimal backheat temperature
Degree, so as to increase therrmodynamic system backheat amount, improves efficiency of thermal cycle, reduces unit net coal consumption rate；Two is when unit load is low
When, feed temperature is improved, and then by the flue-gas temperature after economizer when effectively improving underload, and can ensure that SCR is negative in width
The high efficient district in catalyst is run in the range of lotus, effectively prevent exiting in underload denitrification apparatus, so then for
While energy-saving and emission-reduction are contributed, also save corresponding charges for disposing pollutants and use.
The efficient heat regenerative system of load wide that the present invention is provided is that one kind can be maintained or improved under unit low load condition
The effective measures of feed temperature, so that the unit feature of environmental protection, economy and security are improved, as a kind of load heat regenerative system wide.
Compared with prior art, the present invention has advantages below and technique effect：
(1) because under different load, average feed temperature can remain basically identical, thus at low load, to water temperature
Degree is relative to be significantly improved, and flue-gas temperature is also relative after economizer raises, accordingly even when enter denitrating system at low load reacting
The entrance flue gas temperature of device is still higher, and the operating temperature of catalyst can be made still in normal interval, and this can make denitrating system (SCR)
No longer need out of service, substantially increase the utilization rate of denitrating system, be obviously improved the Environmental Protection Level of unit.
(2) in underrun, regenerative steam amount is increased, reduces cold source energy；Feed temperature is relative to be improved, and is carried
The average endothermic temperature of boiler high；So that unit thermal efficiency of cycle is improved.In addition, the increase of regenerative steam, corresponding to increase
Add the main steam flow under equal load, for the unit of sliding pressure operation, main steam pressure relative can also be improved, therefore average suction
Hot temperature is also accordingly improved, and unit efficiency is also improved.Obvious load is lower, and the relative benefit for obtaining of this inventive technique is got over
Greatly.With the continuous improvement of unit parameter, the effective enthalpy drop of unit drawn gas also accordingly is improved so that the limit produced by the present invention
Benefit increases.It is therefore proposed that a kind of efficient heat regenerative system of load wide, the discharge of pollutant when reducing unit operation, improve and become negative
The feature of environmental protection and economy when lotus runs.
Brief description of the drawings
Fig. 1 is the connection diagram of existing water supply heat back system；
The connection diagram of the load high-efficiency feedwater heat regenerative system a kind of wide that Fig. 2 is provided for the present invention.
Specific embodiment
To become apparent the present invention, hereby with preferred embodiment, and accompanying drawing is coordinated to be described in detail below.
Embodiment
As shown in Fig. 2 being the load high-efficiency feedwater heat regenerative system wide for providing of the invention, including gone here and there successively along feedwater piping 12
Join the three-level heater of connection, two heaters (i.e. No. one heater 6 and No. two heaters 7) top of lower level and steam turbine
High pressure cylinder 1 is connected, and the top of No. three heaters 8 is connected with Steam Turbine Through IP Admission 9, steam turbine high-pressure cylinder 1 and Steam Turbine Through IP Admission 9 and
Main steam line 9 is connected, and the bottom of each heater is connected with the heater of its upper level, the bottom of five-star heater with
Final hydrophobic outlet 15 is connected.It is higher that the present invention sets up a steam pressure on the basis of original heat regenerative system after filling valve 3
Steam port and corresponding jet chimney --- jet chimney 11 after filling valve, and set up final stage feed-water heater 5.By steam at end
After level jet chimney 10 and filling valve 3, jet chimney 11 after introducing filling valve before into steam turbine high-pressure cylinder 1, using benefit
Steam valve 3 controls to enter the steam of final stage feed-water heater 5 with steam control valve 4, is used to heat feedwater.Filling valve jet chimney
Non-return valve 17 is also provided with 11, is guaranteed system security.The hydrophobic of the discharge of top heater 5 is entered by drain water piping 1
A number heater 6 enters No. two heaters 7 by drain water piping 14.Feedwater is flowed through step by step by oxygen-eliminating device by feedwater piping 12
No. three heaters 8, two heater 7, a heater 6, final stage feed-water heaters 5, finally flow to boiler.Steam after filling valve
The 4 pairs of steam for flowing into final stage feed-water heater 5 of steam control valve door installed on pipeline 11 are adjusted, and become in common load
Pressure after steam can be kept to adjust in the range of change is basically unchanged, to maintain feed temperature to meet the requirement that puts into operation of denitrification apparatus.
Final stage feedwater heating steam：The heating vapour source of final stage feed-water heater 5 is used and is introduced into high pressure cylinder from after filling valve 3
The steam of acting.The corresponding steam parameter of the interface of filling valve 3 is that final stage feed-water heater 5 provides an available vapour source,
Final stage feed-water heater 5 is just put into when being less than 75%THA in view of operating mode, the steam set on jet chimney 11 after filling valve
The valve group collective effect arranged in regulating valve 4, with filling valve 3 and main steam line 9, in performing low-load running of machine set by steam
Final stage feed-water heater 5 is introduced, further heating feedwater, to control the optimum feed temperature into economizer import.
The thermal stress of reduction final stage feed-water heater is considered simultaneously, and system bypass 16 is set on main feed water pipe road 12,
In unit operation, final stage feed-water heater 5 is exited during more than 75%THA or less than 40%THA, the steam in system bypass 16
The shell-side of final stage feed-water heater 5 can be made to be in pressurising state, keep the warm-up mode of final stage feed-water heater 5.Work as underload
During operation, load is less than 75%THA and is more than 40%THA, is adjusted by the steam control valve 4 on jet chimney 11 after filling valve
Extraction pressure and the amount of drawing gas.When unit operating mode reaches 75%THA, steam off regulating valve 4 and corresponding valve on main steam line 9
Door group, by the system bypass 16 set on feedwater piping 12, keeps the warm-up mode of final stage feed-water heater 5.
Final feed temperature is reduced and reduced with a steam pumping pressure under conventional power unit running on the lower load, and load wide is efficiently returned
Hot systems set up final stage feed-water heater 5, improve feed temperature under partial load condition.Running on the lower load final feed temperature energy
Enough average about 30 DEG C of raisings.
Final stage feed-water heater 5 is hydrophobic：It is hydrophobic that final stage feed-water heater 5 is respectively provided with two-way, it is respectively normal hydrophobic and
Emergent drain.Wherein emergent drain enters condenser through emergency drain valve and pipeline.It is normally hydrophobic to have two schemes：First
Scheme is to enter a heater 6 by drain water piping 1；Second scheme is to enter No. two by drain water piping 2 14 to add
Hot device 7.
Former water supply heat back system is as shown in table 1 with the energy consumption comparison of the water supply heat back system that the present invention is provided.
Table 1
Claims (6)
1. a kind of load high-efficiency feedwater heat regenerative system wide, including the multiple stage heater being sequentially connected in series along feedwater piping (12),
Two heaters top of lower level is connected with steam turbine high-pressure cylinder (1), and other heaters top is with Steam Turbine Through IP Admission (9) even
Connect, Steam Turbine Through IP Admission (9), steam turbine high-pressure cylinder (1) are connected in series along the steam flow direction of main steam line (9), main steaming
Steam pipe road (9) end is final stage jet chimney (10), and the bottom of each heater is connected with the heater of its upper level, highest
The bottom of heater be connected with final hydrophobic outlet (15), it is characterised in that it is described also including final stage feed-water heater (5)
The next stage of final stage feed-water heater (5) heater of lowermost level on feedwater piping (12), final stage feed-water heater (5) top
Portion is connected by jet chimney (11) after filling valve with steam turbine high-pressure cylinder (1), and final stage feed-water heater (5) bottom is by hydrophobic
The heater of the connection lowermost level of pipeline one (13) connects secondary rudimentary heater by drain water piping two (14).
2. width load high-efficiency feedwater heat regenerative system as claimed in claim 1, it is characterised in that jet chimney after the filling valve
(11) steam control valve (4), check (non-return) valve (17) are provided with.
3. width load high-efficiency feedwater heat regenerative system as claimed in claim 1 or 2, it is characterised in that steam after the filling valve
Pipeline (11) is connected with steam turbine high-pressure cylinder (1), final stage jet chimney (10) respectively, and final stage jet chimney (10) is provided with filling
Valve (3), a part of steam for not doing work(also by filling valve (3) enters final stage feed-water heater by final stage jet chimney
(5), to the feedwater of further heating boiler.
4. width load high-efficiency feedwater heat regenerative system as claimed in claim 1, it is characterised in that gone here and there on the feedwater piping (12)
Connection is connected with three-level heater.
5. width load high-efficiency feedwater heat regenerative system as claimed in claim 1, it is characterised in that feedwater piping (12) two ends
It is connected in parallel to system bypass (16).
6. the load high-efficiency feedwater heat regenerative system wide as described in any one in claim 1,2,4 and 5, it is characterised in that institute
State final stage feed-water heater (5) and condenser is also connected by emergent drain pipeline, emergent drain pipeline is provided with emergency drain valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611120272.0A CN106705019A (en) | 2016-12-07 | 2016-12-07 | Wide-load efficient water supply regenerative system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611120272.0A CN106705019A (en) | 2016-12-07 | 2016-12-07 | Wide-load efficient water supply regenerative system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106705019A true CN106705019A (en) | 2017-05-24 |
Family
ID=58936097
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611120272.0A Pending CN106705019A (en) | 2016-12-07 | 2016-12-07 | Wide-load efficient water supply regenerative system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106705019A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107388230A (en) * | 2017-08-31 | 2017-11-24 | 冯煜珵 | A kind of joint backheating system |
| CN108413378A (en) * | 2018-04-19 | 2018-08-17 | 重庆大学 | It is a kind of to be used for steam turbine and low plus safe and stable operation system |
| CN113756890A (en) * | 2021-09-06 | 2021-12-07 | 西安热工研究院有限公司 | Bypass system optimization method for solving problem of unsmooth drainage of deep peak shaving operation heater |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS627904A (en) * | 1985-07-01 | 1987-01-14 | Hitachi Ltd | Electric power plant system |
| CN202852791U (en) * | 2011-12-30 | 2013-04-03 | 冯伟忠 | Adjustable feed water heat regenerative system for turbo generator unit |
| CN104100309A (en) * | 2014-07-11 | 2014-10-15 | 中国电力工程顾问集团华东电力设计院 | High-temperature steam extraction and cooling system for single-reheat steam turbine |
| CN104456519A (en) * | 2014-11-03 | 2015-03-25 | 章礼道 | Novel efficient water supply heat recovery system for secondary reheating unit |
| CN105953213A (en) * | 2016-05-16 | 2016-09-21 | 长沙湘资生物科技有限公司 | Hot-pressing type ultra supercritical unit number-zero high-pressure heater and switching system thereof |
| CN206439807U (en) * | 2016-12-07 | 2017-08-25 | 上海电气电站设备有限公司 | Wide load high-efficiency feedwater heat regenerative system |
-
2016
- 2016-12-07 CN CN201611120272.0A patent/CN106705019A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS627904A (en) * | 1985-07-01 | 1987-01-14 | Hitachi Ltd | Electric power plant system |
| CN202852791U (en) * | 2011-12-30 | 2013-04-03 | 冯伟忠 | Adjustable feed water heat regenerative system for turbo generator unit |
| CN104100309A (en) * | 2014-07-11 | 2014-10-15 | 中国电力工程顾问集团华东电力设计院 | High-temperature steam extraction and cooling system for single-reheat steam turbine |
| CN104456519A (en) * | 2014-11-03 | 2015-03-25 | 章礼道 | Novel efficient water supply heat recovery system for secondary reheating unit |
| CN105953213A (en) * | 2016-05-16 | 2016-09-21 | 长沙湘资生物科技有限公司 | Hot-pressing type ultra supercritical unit number-zero high-pressure heater and switching system thereof |
| CN206439807U (en) * | 2016-12-07 | 2017-08-25 | 上海电气电站设备有限公司 | Wide load high-efficiency feedwater heat regenerative system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107388230A (en) * | 2017-08-31 | 2017-11-24 | 冯煜珵 | A kind of joint backheating system |
| CN108413378A (en) * | 2018-04-19 | 2018-08-17 | 重庆大学 | It is a kind of to be used for steam turbine and low plus safe and stable operation system |
| CN108413378B (en) * | 2018-04-19 | 2023-08-25 | 重庆大学 | System for be used for steam turbine and low safe steady operation that adds |
| CN113756890A (en) * | 2021-09-06 | 2021-12-07 | 西安热工研究院有限公司 | Bypass system optimization method for solving problem of unsmooth drainage of deep peak shaving operation heater |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105318313B (en) | A kind of smoke waste heat utilization system based on SCR denitration device | |
| CN110529209B (en) | Solar photo-thermal heat storage system and method for deep peak shaving of cogeneration unit | |
| CN106362589A (en) | Device and method for realizing full-load denitration of thermal power generating unit | |
| CN106705019A (en) | Wide-load efficient water supply regenerative system | |
| CN107366897A (en) | A kind of Pollutant in Coal Burning Boiler emission reduction optimization collaboration fume afterheat deep exploitation system | |
| CN107149873B (en) | Energy-saving full-load denitration system | |
| CN206361703U (en) | A kind of SCR inlet flue gas temperature raising system for meeting full load denitration | |
| CN209960532U (en) | Waste heat recycling system of gas boiler | |
| CN205717147U (en) | A kind of full load denitration utilizes and air preheater corrosion-and blocking-prevention coupled system with fume afterheat | |
| CN113623634A (en) | System for greatly improving low-load feed water temperature of power station boiler | |
| CN104976609A (en) | Water feeding heating system capable of improving denitration effect | |
| CN206694081U (en) | A kind of heat regenerative system for thermal power plant | |
| CN201163019Y (en) | System connection device of low temperature coal economizer | |
| CN202762308U (en) | Deep energy-saving system based on flue gas desulfurization and denitrification process optimization | |
| CN106765039B (en) | A kind of SCR inlet flue gas water side temperature raising system and method | |
| CN207012800U (en) | A kind of energy-saving full load denitrating system | |
| CN206439807U (en) | Wide load high-efficiency feedwater heat regenerative system | |
| CN112944431A (en) | Heating system and method for energy gradient utilization | |
| CN210473607U (en) | Full-load SCR denitration system of coal-fired boiler | |
| CN202852791U (en) | Adjustable feed water heat regenerative system for turbo generator unit | |
| CN108487955B (en) | Coal gas efficiency-increasing utilization system based on steam parameter promotion | |
| CN203595114U (en) | Natural circulation drum boiler with smoke warning system | |
| CN105889899A (en) | Superheated steam temperature adjusting system and method suitable for SCR low-load operation | |
| CN102494329A (en) | Device for utilizing flue gas waste heat of boiler comprehensively | |
| CN202675253U (en) | Device for utilizing waste heat of smoke of thermal power generating unit boiler |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20170524 |
|
| WD01 | Invention patent application deemed withdrawn after publication |