CN109028093A - A kind of multipaths coupled electricity-generation system using fossil fuel Yu oxygen-enriched combusting rubbish - Google Patents
A kind of multipaths coupled electricity-generation system using fossil fuel Yu oxygen-enriched combusting rubbish Download PDFInfo
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- CN109028093A CN109028093A CN201810626313.6A CN201810626313A CN109028093A CN 109028093 A CN109028093 A CN 109028093A CN 201810626313 A CN201810626313 A CN 201810626313A CN 109028093 A CN109028093 A CN 109028093A
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- oxygen
- enriched combusting
- flue gas
- rubbish
- temperature
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C6/00—Combustion apparatus characterised by the combination of two or more combustion chambers or combustion zones, e.g. for staged combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C9/00—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber
- F23C9/06—Combustion apparatus characterised by arrangements for returning combustion products or flue gases to the combustion chamber for completing combustion
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L7/00—Supplying non-combustible liquids or gases, other than air, to the fire, e.g. oxygen, steam
- F23L7/007—Supplying oxygen or oxygen-enriched air
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
Abstract
The present invention relates to a kind of multipaths coupled electricity-generation systems for using fossil fuel Yu oxygen-enriched combusting rubbish, including coal-burning boiler, it is characterized in that, it further include oxygen-enriched combusting waste incinerator, rubbish to be processed and filtrate are admitted to oxygen-enriched combusting waste incinerator, the high-temperature flue gas that oxygen-enriched combusting waste incinerator generates is cooled to T1 after bypassing economizer, temperature is that the flue gas of T1 is successively admitted to inhibition dioxin device after evaporator and superheater again, the flue gas of dioxin device is inhibited to be cooled to T2 after second level economizer out, temperature is that the flue gas of T2 is divided into two-way, one routing high-temperature blower is sent into coal-burning boiler burner hearth, enter oxygen-enriched combusting waste incinerator burner hearth via First air channel and secondary air channel respectively after the recycled blower adherence pressure of another way.The influence very little that the present invention generates the combustion process of coal-burning boiler, is also greatly reduced the requirement for introducing coal-burning boiler burner hearth mode, while reducing the extent of the destruction to water-cooling wall.
Description
Technical field
The present invention relates to a kind of boiler system more particularly to a kind of multipaths for using fossil fuel Yu oxygen-enriched combusting rubbish
Coupled electricity-generation system.
Background technique
With the development of economy, people's living standard is greatly improved, along with producing a large amount of rubbish,
Rubbish causes seriously to pollute to atmosphere, soil, water source etc., causes significant damage to our living environment, solves rubbish and asks
It inscribes very urgent.Statistics display, China's domestic waste amount of clearing 2016 more than 2.15 hundred million tons.
The principle of " recycling, minimizing, innoxious " that is proposed according to China to garbage disposal and the rubbish in China are special
Property, in recent years, garbage incineration technology is increasingly becoming the new trend of China's garbage disposal.However, the dioxin of waste incineration generation,
The pollutants such as chloride, sulfur dioxide, nitrogen oxides, be both needed to burning power plant be individually equipped with complicated flue gas purification system into
Row processing, investment is big, energy consumption is high, purification efficiency is low, and traditional waste incineration and generating electricity unit efficiency is only 18-25%.
For this purpose, there is scholar to propose to couple large coal-fired boiler with waste incinerator to solve waste incinerator pollution in recent years
Object processing cost height and the low disadvantage of generating efficiency.Wherein, the tail flue gas that fume side coupling generates waste incinerator introduces
Coal-burning boiler has saved flue gas of garbage furnace purification system equipment investment；Steam side couples the master for generating waste incinerator
Steam introduces the therrmodynamic system of coal unit, and the waste incinerator calorific value part of low-lying level is transferred to the coal-fired pot of high level
Furnace power generation realizes that rubbish calorific value efficiently utilizes.
However, in actual engineering design, there are two aspects in this coupling thinking: first, in fume side, by
In the waste incineration the characteristics of, the usual volume of flue gas that waste incinerator generates is larger, while by booster fan operating temperature
Limitation, the temperature for introducing large-scale electricity generation boiler is relatively low, and normally no higher than 450 DEG C, these a large amount of low-temperature flue gas will be right
The hearth combustion boiler generation of large-scale electricity generation boiler seriously affects, and large-scale power generation is especially most likely resulted in middle-low load
Fire extinguishing phenomenon occurs for boiler furnace, jeopardizes the safe operation of boiler, to greatly limit the capacity of coupling waste incinerator.The
Two, in steam side, how the heating surface of two boilers is subjected to reasonable, safety coupling and still lacks effective thinking and side
Method.
Summary of the invention
The purpose of the present invention is: the capacity of coupling waste incinerator is increased substantially, while waste incineration is greatly lowered
The investment of boiler flue gas purification system.
In order to achieve the above object, the technical solution of the present invention is to provide one kind to use fossil fuel and oxygen-enriched combusting rubbish
The multipaths coupled electricity-generation system of rubbish, including coal-burning boiler, which is characterized in that further include oxygen-enriched combusting waste incinerator, wait locate
Reason rubbish and filtrate are admitted to oxygen-enriched combusting waste incinerator, and the high-temperature flue gas that oxygen-enriched combusting waste incinerator generates is by bypass
T1 is cooled to after economizer, temperature is that the flue gas of T1 is successively admitted to inhibition dioxin dress after evaporator and superheater again
It sets, inhibits the flue gas of dioxin device to be cooled to T2 after second level economizer out, the flue gas that temperature is T2 is divided into two-way, and one
It routes high-temperature blower to be sent into coal-burning boiler burner hearth, respectively via First air channel after the recycled blower adherence pressure of another way
Enter oxygen-enriched combusting waste incinerator burner hearth with secondary air channel.
Preferably, the inhibition dioxin device includes CaO equipment and cyclone separator.
Preferably, level-one economizer is equipped on the First air channel, the flue gas that temperature is T2 drops in level-one economizer
Temperature is to T3.
Preferably, working medium is exported from the coal-burning boiler coal economizer introduces and is divided into two-way, successively passes through described one all the way
The wall superheater of the coal-burning boiler is introduced after grade economizer, the second level economizer, the evaporator and the superheater；
Another way still keeps liquid water state after bypass economizer heat exchange, and leads to the furnace heating surface of the coal-burning boiler
Entrance.
Preferably, the temperature of the high-temperature flue gas is not less than 850 DEG C, and the T2 is not higher than 450 DEG C, and the T3 is not less than
200℃。
It preferably, further include air-separating plant, the high-purity oxygen separated after air input air separator
Each lead into the First air channel and the secondary air channel.
Preferably, control 25 into the high purity oxygen gas concentration of the First air channel and the secondary air channel~
Between 30%.
Preferably, the coupled flue gas connecting pipe of flue gas that temperature is T2 is introduced from the dry bottom hopper region of the coal-burning boiler
In the burner hearth of the coal-burning boiler.
Boiler coupled system provided by the invention, due to being mentioned through high-temperature blower in such a way that oxygen-enriched combusting handles rubbish
The volume of coupling flue gas after boosting power is only that air burning generates cigarette under the conditions of using identical quantity of refuse and identical flue-gas temperature
About the 20% of air volume.So the influence that generates not only for the combustion process for using fossil-fuel boiler of a small amount of flue gas is very
It is small, it is also greatly reduced introducing and uses fossil-fuel boiler burner hearth mode (the number of openings and aperture size on water-cooling wall)
It is required that while reducing extent of the destruction to water-cooling wall.
Due to being conducive to oxygen-enriched combusting waste incinerator in terms of following two in such a way that oxygen-enriched combusting handles rubbish
The inhibition of interior dioxin:
(1) by total oxygen concentration in the First air and Secondary Air that enter oxygen-enriched combusting waste incinerator burner hearth 25~
Between 30%, can obtaining higher oxygen-enriched combusting waste incinerator burner hearth exit gas temperature easily, (this usual temperature can
Control is at 1000 DEG C or more)；
(2) 60~70% when the exhaust gas volumn of oxygen-enriched combusting waste incinerator burner hearth outlet is about air burning, current
Under the flue cross section dimensional conditions of air burning waste incinerator, the residence time of high-temperature flue gas can increase by 50% or more, simultaneously
Dioxin concentration in flue gas can be reduced by 50% or more.
In order to inhibit the generation of dioxin in oxygen-enriched combusting waste incinerator burner hearth, the oxygen concentration increased in flue gas is
It is realized by increasing purity oxygen rather than air, this, which will be greatly lowered, introduces the coupling flue gas for using fossil-fuel boiler
Volume.
In oxygen-enriched combusting refuse incinerator system, First air and Secondary Air higher temperature when all having than air burning
And oxygen concentration, this is all very favorable to the kindling of rubbish, combustion process early period or even entire combustion process.
In coupled system, water supply is introduced from certain primary outlet for using fossil-fuel boiler furnace heating surface upstream,
In only some water supply become steam and introduce and use the superheater surface of fossil-fuel boiler, and most of water supply is still with liquid
It is introduced after the form of state water is heated and uses fossil-fuel boiler furnace heating surface entrance.Such heating surface setting can be true
Under conditions of guarantor uses fossil-fuel boiler hydrodynamic force safety, the heat transfer of guarantee back-end surfaces is coupling oxygen-enriched combustion as much as possible
It is remained unchanged under conditions of burning waste incinerator, no matter whether oxygen-enriched combusting waste incinerator works, and uses fossil-fuel boiler
It can operate normally, this considerably increases the flexibilities of coupled system operation.
From the aspect of energy consumption, although increasing air-separating plant, due to the coupling of steam side, working medium final temperature has bright
Aobvious to improve, the promotion of cycle efficieny is significantly greater than energy consumption caused by increasing air-separating plant and reduces, all in all, system thermal effect
Rate is also significantly increased.
From the point of view of investment, due to using fossil-fuel boiler and oxygen-enriched combusting waste incinerator in fume side and steam side
Coupling, by rationally using the existing flue gas purification system for using fossil-fuel boiler, largely saving air burning
Flue gas purification system needed for waste incinerator, to considerably reduce cost of investment.
Detailed description of the invention
Fig. 1 is a kind of multipaths coupled electricity-generation system for using fossil fuel and oxygen-enriched combusting rubbish provided by the invention
Schematic diagram.
Specific embodiment
In order to make the present invention more obvious and understandable, hereby with preferred embodiment, and attached drawing is cooperated to be described in detail below.
As shown in Figure 1, a kind of coal-fired series coupled electricity generation system with oxygen-enriched combusting rubbish disclosed in the present embodiment includes
Oxygen-enriched combusting waste incinerator A1 and coal-burning boiler B1.
The fire grate that rubbish AF1 and its filtrate AF2 to be processed enter oxygen-enriched combusting waste incinerator A1 participates in burning.Oxygen-enriched combustion
The high-temperature flue gas that the temperature for burning waste incinerator A1 furnace outlet is 1050 DEG C temperature after bypassing economizer S11 is down to 650
℃.650 DEG C of flue gas is successively after evaporator S23 and superheater S24, using CaO plus spray apparatus and cyclone separator A2.
Flue gas is by adding in spray apparatus plus spraying CaO in CaO and remove dioxin therein by measures such as cyclone separator A2 ash disposal.Flue gas
450 DEG C are cooled to by second level economizer S22 after cyclone separator A2 out.450 DEG C of flue gas is divided into two-way: all the way through high temperature
After blower A3 adherence pressure, coupled flue gas connecting pipe introduces coal-burning boiler B1 burner hearth from the dry bottom hopper region of coal-burning boiler B1
In；First air channel A6 and secondary air channel A7 are each led into after the recycled blower A4 adherence pressure of another way, respectively as
First air and Secondary Air enter oxygen-enriched combusting waste incinerator A1 burner hearth and participate in burn rubbish AF1 and its filtrate AF2 to be processed.Its
Middle First air is introduced from the fire grate lower part of oxygen-enriched combusting waste incinerator A1, and Secondary Air is from oxygen-enriched combusting waste incinerator A1 fire grate
It is introduced at the certain altitude of top.
Meanwhile air be passed through the high-purity oxygen separated after air-separating plant A5 be also passed into First air channel A6 and
In secondary air channel A7.High-purity oxygen enters richness in First air and Secondary Air respectively as a part of First air and Secondary Air
It is mixed into respectively before oxygen combustion refuse incinerator A1 burner hearth.Into the First air and Secondary Air of oxygen-enriched combusting waste incinerator A1 burner hearth
In total oxygen concentration be 27%.
It is provided with level-one economizer S21 on the A6 of First air channel, First air is entered into oxygen-enriched combusting by level-one economizer S21
The temperature of waste incinerator A1 burner hearth is controlled at 200 DEG C.
Working medium introduces and is divided into two-way from coal-burning boiler B1 economizer exit, successively passes through level-one economizer S21, two all the way
The wall superheater of coal-burning boiler B1, superheater S24 and large-size screen monitors are introduced after grade economizer S22, evaporator S23 and superheater S24
The vapor (steam) temperature difference of superheater outlet controls near 10 DEG C；Another way still keeps liquid after bypass economizer S11 heat exchange
Water state, and the furnace heating surface entrance of coal-burning boiler B1 is led to, a part of oxygen-enriched combusting waste incinerator A1 internal heating surface
It can be used to heat the reheated steam for using fossil-fuel boiler.
Activated carbon adsorption device is added between the desulfurizer and dust-extraction unit being connected with coal-burning boiler B1.
Claims (8)
1. a kind of multipaths coupled electricity-generation system for using fossil fuel Yu oxygen-enriched combusting rubbish, including coal-burning boiler (B1),
It is characterized in that, further includes oxygen-enriched combusting waste incinerator (A1), rubbish (AF1) and filtrate (AF2) to be processed are admitted to oxygen-enriched combustion
It burns waste incinerator (A1), the high-temperature flue gas that oxygen-enriched combusting waste incinerator (A1) generates quilt after bypassing economizer (S11)
It is cooled to T1, temperature is that the flue gas of T1 is successively admitted to inhibition dioxin dress after evaporator (S23) and superheater (S24) again
It sets, the flue gas of dioxin device is inhibited to be cooled to T2 after second level economizer (S22) out, temperature is that the flue gas of T2 is divided into two
Road, routing high-temperature blower (A3) is sent into coal-burning boiler (B1) burner hearth, after the recycled blower of another way (A4) adherence pressure
Enter oxygen-enriched combusting waste incinerator (A1) burner hearth via First air channel (A6) and secondary air channel (A7) respectively.
2. a kind of multipaths coupled electricity-generation system for using fossil fuel Yu oxygen-enriched combusting rubbish as described in claim 1,
It is characterized in that, the inhibition dioxin device includes CaO equipment and cyclone separator (A2).
3. a kind of multipaths coupled electricity-generation system for using fossil fuel Yu oxygen-enriched combusting rubbish as described in claim 1,
It is characterized in that, is equipped with level-one economizer (S21) on the First air channel (A6), temperature is T2 by level-one economizer (S21)
Flue gas cool-down to T3.
4. a kind of multipaths coupled electricity-generation system for using fossil fuel Yu oxygen-enriched combusting rubbish as claimed in claim 3,
It is characterized in that, working medium introduces and be divided into two-way from the coal-burning boiler (B1) economizer exit, successively passes through the level-one all the way
Economizer (S21), the second level economizer (S22), the evaporator (S23) and the superheater (S24) introduce the combustion afterwards
The wall superheater of coal burning boiler (B1)；Another way still keeps liquid water state after the bypass economizer (S11) exchanges heat, and
Lead to the furnace heating surface entrance of the coal-burning boiler (B1).
5. a kind of multipaths coupled electricity-generation system for using fossil fuel Yu oxygen-enriched combusting rubbish as claimed in claim 3,
It is characterized in that, the temperature of the high-temperature flue gas is not less than 850 DEG C, and the T2 is not higher than 450 DEG C, and the T3 is not less than 200 DEG C.
6. a kind of multipaths coupled electricity-generation system for using fossil fuel Yu oxygen-enriched combusting rubbish as described in claim 1,
It is characterized in that, further includes air-separating plant (A5), the high purity oxygen separated after air input air separator (A5)
Gas each leads into the First air channel (A6) and the secondary air channel (A7).
7. a kind of multipaths coupled electricity-generation system for using fossil fuel Yu oxygen-enriched combusting rubbish as claimed in claim 6,
Be characterized in that, into the control of the high purity oxygen gas concentration of the First air channel (A6) and the secondary air channel (A7) 25~
Between 30%.
8. a kind of multipaths coupled electricity-generation system for using fossil fuel Yu oxygen-enriched combusting rubbish as described in claim 1,
It is characterized in that, temperature introduces institute from the dry bottom hopper region of the coal-burning boiler (B1) for the coupled flue gas connecting pipe of flue gas of T2
In the burner hearth for stating coal-burning boiler (B1).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810626313.6A CN109028093A (en) | 2018-06-15 | 2018-06-15 | A kind of multipaths coupled electricity-generation system using fossil fuel Yu oxygen-enriched combusting rubbish |
| PCT/CN2019/086649 WO2019237869A1 (en) | 2018-06-15 | 2019-05-13 | Multi-process coupled power generation system combusting fossil fuel and oxygen-rich combustion waste |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810626313.6A CN109028093A (en) | 2018-06-15 | 2018-06-15 | A kind of multipaths coupled electricity-generation system using fossil fuel Yu oxygen-enriched combusting rubbish |
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| Publication Number | Publication Date |
|---|---|
| CN109028093A true CN109028093A (en) | 2018-12-18 |
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| CN201810626313.6A Pending CN109028093A (en) | 2018-06-15 | 2018-06-15 | A kind of multipaths coupled electricity-generation system using fossil fuel Yu oxygen-enriched combusting rubbish |
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| CN (1) | CN109028093A (en) |
| WO (1) | WO2019237869A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019237869A1 (en) * | 2018-06-15 | 2019-12-19 | 上海锅炉厂有限公司 | Multi-process coupled power generation system combusting fossil fuel and oxygen-rich combustion waste |
| CN113175668A (en) * | 2021-06-07 | 2021-07-27 | 西安热工研究院有限公司 | Be applicable to active service thermal power boiler hydrogen combustion transformation system |
| CN113237060A (en) * | 2021-06-07 | 2021-08-10 | 西安热工研究院有限公司 | Be applicable to zero carbon emission of coal-fired thermal power boiler hydrogen fuel of active service transformation system |
| CN115046207A (en) * | 2022-06-10 | 2022-09-13 | 西安热工研究院有限公司 | Method and system for improving denitration flue gas temperature through pyrolysis gas afterburning |
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| JPH09210338A (en) * | 1996-02-06 | 1997-08-12 | Nkk Corp | Processing system for coal ash in thermal power station |
| CN201396766Y (en) * | 2009-05-31 | 2010-02-03 | 王中 | Flue gas recirculation and low-position waste heat energy reutilization device for garbage incinerator |
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| CN206429276U (en) * | 2017-01-23 | 2017-08-22 | 中国电力工程顾问集团东北电力设计院有限公司 | A kind of thermal power plant's clean energy resource utilizes system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109028093A (en) * | 2018-06-15 | 2018-12-18 | 上海锅炉厂有限公司 | A kind of multipaths coupled electricity-generation system using fossil fuel Yu oxygen-enriched combusting rubbish |
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2018
- 2018-06-15 CN CN201810626313.6A patent/CN109028093A/en active Pending
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2019
- 2019-05-13 WO PCT/CN2019/086649 patent/WO2019237869A1/en active Application Filing
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH09210338A (en) * | 1996-02-06 | 1997-08-12 | Nkk Corp | Processing system for coal ash in thermal power station |
| CN201396766Y (en) * | 2009-05-31 | 2010-02-03 | 王中 | Flue gas recirculation and low-position waste heat energy reutilization device for garbage incinerator |
| CN203744266U (en) * | 2014-03-19 | 2014-07-30 | 温向远 | Auxiliary thermal power generation system for waste incineration |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019237869A1 (en) * | 2018-06-15 | 2019-12-19 | 上海锅炉厂有限公司 | Multi-process coupled power generation system combusting fossil fuel and oxygen-rich combustion waste |
| CN113175668A (en) * | 2021-06-07 | 2021-07-27 | 西安热工研究院有限公司 | Be applicable to active service thermal power boiler hydrogen combustion transformation system |
| CN113237060A (en) * | 2021-06-07 | 2021-08-10 | 西安热工研究院有限公司 | Be applicable to zero carbon emission of coal-fired thermal power boiler hydrogen fuel of active service transformation system |
| CN115046207A (en) * | 2022-06-10 | 2022-09-13 | 西安热工研究院有限公司 | Method and system for improving denitration flue gas temperature through pyrolysis gas afterburning |
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| Publication number | Publication date |
|---|---|
| WO2019237869A1 (en) | 2019-12-19 |
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Application publication date: 20181218 |
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