CN105736069A - Method for efficiency improvement and renovation of coal-fired thermal power generating unit - Google Patents
Method for efficiency improvement and renovation of coal-fired thermal power generating unit Download PDFInfo
- Publication number
- CN105736069A CN105736069A CN201610098404.8A CN201610098404A CN105736069A CN 105736069 A CN105736069 A CN 105736069A CN 201610098404 A CN201610098404 A CN 201610098404A CN 105736069 A CN105736069 A CN 105736069A
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- Prior art keywords
- temperature
- steam
- fossil
- heating surface
- boiler
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B35/00—Control systems for steam boilers
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06Q—INFORMATION AND COMMUNICATION TECHNOLOGY [ICT] SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES; SYSTEMS OR METHODS SPECIALLY ADAPTED FOR ADMINISTRATIVE, COMMERCIAL, FINANCIAL, MANAGERIAL OR SUPERVISORY PURPOSES, NOT OTHERWISE PROVIDED FOR
- G06Q50/00—Systems or methods specially adapted for specific business sectors, e.g. utilities or tourism
- G06Q50/06—Electricity, gas or water supply
Abstract
The invention provides a method for efficiency improvement and renovation of a coal-fired thermal power generating unit. The method comprises the following steps of performing metal evaluation on a heated surface material of a coal-fired thermal power generating unit boiler by adopting a metal material evaluation method to determine a maximum allowable temperature of the heated surface material; determining steam admission temperature parameters of a steam turbine, and determining an increasable steam temperature range value by combining the maximum allowable temperature with the steam admission temperature parameters; and renovating the coal-fired thermal power generating unit according to the temperature requirement of the steam in the coal-fired thermal power generating unit and the increasable steam temperature range value. According to the method, the breakthrough of a renovation design idea is focused, temperature parameters of unit steam are scientifically and reasonably determined according to the capacity of heated surface equipment of an existing boiler, and good economy of the unit can be obtained after comprehensive renovation.
Description
Technical field
The method that the present invention relates to coal-fired thermal power generating technology field, in particular to a kind of method of fossil-fired unit renovation and improving.
Background technology
Economy during current active service 300MW, 600MW level fired power generating unit actual motion is poor, and main cause has:
1, unit design parameter is canonical parameter, and the selection of metal material exists allowance with mating of initial conditions, causes that unit equipment ability is difficult to give full play to, and during operation, cycle efficieny is on the low side..
2, by the impact of traditional design theory, the type selecting of Thermal Power Enterprises generator set device and design, especially the type selecting of steam turbine and design, there is allowance situation bigger than normal, along with unit utilizes the decline by a relatively large margin of hourage, the optimal working point of unit partial load condition point off-design, its performance driving economy is poor.For this in the urgent need to changing traditional design concept, by transforming, improve efficiency of thermal cycle, steam turbine internal efficiency etc., reduce thermal loss of steam turbine rate, improve unit operation economy, reduce unit net coal consumption rate.
Conventional thermoelectricity Subcritical Units transformation, mainly improved by the technical capability of Design of Steam Turbine manufacturing process and promote, remain in technology innovation aspect, do not carry out the breakthrough of theory, being limited by above-mentioned two factors, the investment return sexual valence ratio of Transformation of Unit is had a greatly reduced quality.
For solving above-mentioned technical problem, the present invention provides a kind of method of fossil-fired unit High Efficiency Reform.
Summary of the invention
For overcoming above-mentioned the deficiencies in the prior art; the present invention provides a kind of method of fossil-fired unit renovation and improving; the method pays close attention to the breakthrough of improvement and design theory; will according to active service boiler heating surface capacity of equipment; the scientific and reasonable temperature parameter determining unit steam, it is ensured that good economy can be obtained after unit comprehensive reformation.
Realizing the solution that above-mentioned purpose adopts is:
A kind of method of fossil-fired unit renovation and improving, it thes improvement is that: said method comprising the steps of:
Adopt metal material appraisal procedure that the heating surface material of described fossil-fired unit boiler is carried out metal assessment, it is determined that the maximum allowable temperature of described heating surface material；
Determine turbine-inlet temperature parameter, determine in conjunction with described maximum allowable temperature and turbine-inlet temperature parameter and can promote vapor (steam) temperature value range；
Temperature requirement and the described vapor (steam) temperature value range that promotes according to described fossil-fired unit steam transform described fossil-fired unit.
Preferably, the method for described fossil-fired unit renovation and improving is:
Being assessed by the metal of boiler main steam system heating surface material, discharge the temperature margin of its metal material, described boiler main steam system is not transformed, and slightly improves temperature 3 DEG C-10 DEG C on the basis of former main steam temperature.
Preferably, the method for described fossil-fired unit renovation and improving is:
Assessed by the material metal of boiler reheating steam system heating surface, transform described boiler reheating steam system heating surface, change reheater system heating surface metal material, improve its grade, or increase the area of heating surface, on the basis of former reheat steam temperature, temperature 25 DEG C-35 DEG C is greatly improved.
Compared with immediate prior art, the method have the advantages that
Method provided by the invention, by assessing capacity of equipment, in the scope that boiler heating surface material allows, it is determined that unit the best vapor (steam) temperature parameter；It is different from the thermoelectricity Subcritical Units transformation of routine, transformation boiler main steam system and reheating steam system, promote the grade of main steam system and reheater system heating surface metal material, temperature is greatly improved on the basis of former main steam temperature and reheat steam temperature, the reconstruction scope is big, it is necessary to investment big；The method ensures to improve to greatest extent under the premise that investment for trnasforming urban land minimizes unit actual operating efficiency；Optimize steam turbine steam inlet condition, improve unit cycle efficieny, reduce thermal loss of steam turbine rate.The method breaches the conventional thought of fossil-fired unit improved method in prior art, determines remodeling method according to transformation requirement, and the reconstruction scope is little, it is necessary to investment less, investment return sexual valence ratio is high, it is adaptable to the various fossil-fired units needing transformation.
Accompanying drawing explanation
Fig. 1 is subcritical pressure turbine group production procedure schematic diagram.
Detailed description of the invention
It is more fully described the exemplary embodiment of the disclosure below with reference to accompanying drawings.Although accompanying drawing shows the exemplary embodiment of the disclosure, it is to be understood that, may be realized in various forms the disclosure and should do not limited by embodiments set forth here, other embodiments can include structure, logic, electric, process and other change.Embodiment only represents possible change.On the contrary, it is provided that these embodiments are able to be best understood from the disclosure, and the scope of the present disclosure can intactly convey to those skilled in the art.Herein, these embodiments of the present invention can by individually or overall term " invention " represent, this is only used to conveniently, and if in fact disclose the invention of more than one, what be not meant to automatically to limit this application ranges for any single invention or inventive concept.
As it is shown in figure 1, Fig. 1 is subcritical pressure turbine group production procedure schematic diagram；Concrete production process is as follows:
Water is heated to form steam in the boiler, superheated steam it is heated into further then through superheater, superheated steam enters steam turbine high-pressure cylinder expansion work by main steam line, high pressure cylinder steam discharge is returned to boiler reheater and reheats into reheated steam, during reheated steam is entered by reheaing steam pipe, low pressure (LP) cylinder continue expansion work, low pressure (LP) cylinder steam discharge enters the cooled water of condenser and is cooled to condensation water, condensing water to be beaten to high-pressure heater by feed pump after heating and deoxygenation in low-pressure heater and oxygen-eliminating device, the feedwater after high-pressure heater heats enters boiler.Steam Turbine Driven electromotor, is electric energy by mechanical energy, it is achieved produce generating.
Based on above-mentioned subcritical pressure turbine group production procedure, a kind of method that the invention provides fossil-fired unit renovation and improving, the method comprises the following steps:
1, the boundary condition of fossil-fired unit is determined
The heating surface material of fossil-fired unit is carried out metal assessment, in the scope that boiler heating surface allows, it is determined that unit the best vapor (steam) temperature parameter and boiler heating surface metal maximum allowable temperature.
In the present invention, the metal assessment reference metal parts evaluation criteria of the heating surface material of fossil-fired unit.
Above-mentioned evaluation criteria includes:
I, GB/T16507-2013 " water-tube boiler " series standard
II, GB/T9222-2008 " pressure parts for water tube boiler Strength co-mputation "
III, ASME the IIth roll of material D section performance 2013 editions
IV, TSGG0001-2012 " boiler safety technology Supervision Code "
V, DL/T940-2005 " thermal power plant jet chimney Life Assessment Technology directive/guide "
VI, DL/T654-2009 " fired power generating unit Life Assessment Technology directive/guide "
VII, DL/T441-2004 " thermal power plant high temperature and high pressure steam pipeline creep supervision code "
VIII, DL/T939-2005 " heat power plant boiler heating surface supervision and inspection fire protection technology "
IX, DL/T884-2004 " thermal power plant's metal lographic examination and assessment technology directive/guide "
X, DL/T438-2009 " thermal power plant alloying technology supervision code "
XI, DL/T440-2004 " inspection of in-service station boiler drum and evaluation code "
Practical application carries out in conjunction with above-mentioned standard the metal assessment of the heating surface material of fossil-fired unit according to boiler material to be rebuilt.
2, determine turbine-inlet temperature parameter, determine in conjunction with described boiler heating surface metal maximum allowable temperature and turbine-inlet temperature parameter and can promote temperature range value.
3, adopt steam turbine advanced technology design concept according to the steam parameter determined, Turbine Flow Path is put into the melting pot, improve unit efficiency of thermal cycle, improve turbine efficiency.Including:
(1) being assessed by the metal of boiler main steam system heating surface material, discharge the temperature margin of its metal material, described boiler main steam system is not transformed, and slightly improves temperature 3 DEG C-10 DEG C on the basis of former main steam temperature.
When being typically in not transforming main steam system, the highest raising 10 DEG C, general raising 5 DEG C, it is ensured that temperature value is in safety range.
(2) assessed by the material metal of boiler reheating steam system heating surface, transform described boiler reheating steam system heating surface, change reheater system heating surface metal material, improve its grade, or increase the area of heating surface, on the basis of former reheat steam temperature, temperature 25 DEG C-35 DEG C is greatly improved.
By above comprehensive renovation and improving, it is achieved Subcritical Units energy-saving and emission-reduction under minimizing investment situation, potentiation extra earning purpose.
Finally should be noted that: above example is merely to illustrate the technical scheme of the application but not the restriction to its protection domain; although with reference to above-described embodiment to present application has been detailed description; those of ordinary skill in the field are it is understood that the detailed description of the invention of application still can be carried out all changes, amendment or equivalent replacement by those skilled in the art after reading the application; but these change, revise or equivalent replacement, all within the claims that application is awaited the reply.
Claims (3)
1. the method for a fossil-fired unit renovation and improving, it is characterised in that: said method comprising the steps of:
Adopt metal material appraisal procedure that the heating surface material of described fossil-fired unit boiler is carried out metal assessment, it is determined that the maximum allowable temperature of described heating surface material；
Determine turbine-inlet temperature parameter, determine in conjunction with described maximum allowable temperature and turbine-inlet temperature parameter and can promote vapor (steam) temperature value range；
Temperature requirement and the described temperature range value that promotes according to described fossil-fired unit steam transform described fossil-fired unit.
2. the method for a kind of fossil-fired unit renovation and improving as claimed in claim 1, it is characterised in that: the method for described transformation fossil-fired unit is:
Being assessed by the metal of boiler main steam system heating surface material, discharge the temperature margin of its metal material, described boiler main steam system is not transformed, and slightly improves temperature 3 DEG C-10 DEG C on the basis of former main steam temperature.
3. the method for a kind of fossil-fired unit renovation and improving as claimed in claim 1, it is characterised in that: the method for described transformation fossil-fired unit is:
Assessed by the material metal of boiler reheating steam system heating surface, transform described boiler reheating steam system heating surface, change reheater system heating surface metal material, improve its grade, or increase the area of heating surface, on the basis of former reheat steam temperature, temperature 25 DEG C-35 DEG C is greatly improved.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610098404.8A CN105736069A (en) | 2016-02-23 | 2016-02-23 | Method for efficiency improvement and renovation of coal-fired thermal power generating unit |
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| CN201610098404.8A CN105736069A (en) | 2016-02-23 | 2016-02-23 | Method for efficiency improvement and renovation of coal-fired thermal power generating unit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106528501A (en) * | 2016-10-28 | 2017-03-22 | 华电能源股份有限公司哈尔滨第三发电厂 | Method for obtaining internal efficiency of thermal power unit |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203547811U (en) * | 2013-09-04 | 2014-04-16 | 冯伟忠 | Improved high temperature subcritical unit |
| CN104421922A (en) * | 2013-09-04 | 2015-03-18 | 冯伟忠 | Modifying method for subcritical unit |
-
2016
- 2016-02-23 CN CN201610098404.8A patent/CN105736069A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203547811U (en) * | 2013-09-04 | 2014-04-16 | 冯伟忠 | Improved high temperature subcritical unit |
| CN104421922A (en) * | 2013-09-04 | 2015-03-18 | 冯伟忠 | Modifying method for subcritical unit |
Non-Patent Citations (1)
| Title |
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| 帅军庆: "《电力企业资产全寿命周期管理：理论、方法及应用》", 30 April 2010, 中国电力出版社 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106528501A (en) * | 2016-10-28 | 2017-03-22 | 华电能源股份有限公司哈尔滨第三发电厂 | Method for obtaining internal efficiency of thermal power unit |
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